Sprout Social (SPT) S-110 Aug 20IPO registrationFinancial data

Company Profile

Cover Page

Cover Page	6 Months Ended
Cover Page	Jun. 30, 2020
Cover [Abstract]
Document Type	S-1
Entity Registrant Name	SPROUT SOCIAL, INC.
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Central Index Key	0001517375
Amendment Flag	false

Consolidated Balance Sheets Con

Consolidated Balance Sheets Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 79,792	$ 135,310	$ 26,190
Marketable securities	49,671	0
Accounts receivable, net of allowances of $1,691, $706 and $374 at June 30, 2020, December 31, 2019 and 2018, respectively	14,089	11,099	10,551
Deferred commissions	6,715	5,574	3,634
Prepaid expenses and other assets	4,157	5,050	2,507
Total current assets	154,424	157,033	42,882
Property and equipment, net	13,410	13,529	15,524
Deferred commissions, net of current portion	6,367	5,505	4,087
Operating lease, right-of-use asset	10,443	5,618
Goodwill	2,299	2,299	2,299
Intangible assets, net	4,769	5,482	7,014
Other assets, net	124	125	39
Total assets	191,836	189,591	71,845
Current liabilities
Accounts payable	2,228	2,049	1,784
Deferred revenue	35,264	29,566	21,150
Operating lease liability	1,941	2,331
Accrued wages and payroll related benefits	4,456	4,053	3,735
Accrued expenses and other	5,823	5,057	4,402
Total current liabilities	49,712	43,056	31,071
Deferred rent, net of current portion			14,651
Deferred revenue, net of current portion	201	209	390
Operating lease liability, net of current portion	22,889	18,196	0
Total liabilities	72,802	61,461	46,112
Commitments and contingencies (Note 10)
Stockholders’ (deficit)/equity
Preferred stock		0	0
Common stock		0	1
Additional paid-in capital	280,104	263,943	1,844
Treasury stock, at cost	(26,905)	(20,430)	(10,507)
Accumulated deficit	(134,170)	(115,388)	(68,581)
Total stockholders’ equity	119,034	128,130	25,733
Total liabilities and stockholders’ equity	191,836	189,591	71,845
Series A convertible preferred stock
Stockholders’ (deficit)/equity
Preferred stock		0	448
Series A-1 convertible preferred stock
Stockholders’ (deficit)/equity
Preferred stock		0	800
Series B convertible preferred stock
Stockholders’ (deficit)/equity
Preferred stock		0	9,961
Series B-1 convertible preferred stock
Stockholders’ (deficit)/equity
Preferred stock		0	9,663
Series C convertible preferred stock
Stockholders’ (deficit)/equity
Preferred stock		0	41,799
Series D convertible preferred stock
Stockholders’ (deficit)/equity
Preferred stock		0	40,305
Class A common stock
Stockholders’ (deficit)/equity
Common stock	4	4	0
Class B common stock
Stockholders’ (deficit)/equity
Common stock	$ 1	$ 1	$ 0

Consolidated Balance Sheets C_2

Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for doubtful accounts	$ 1,691	$ 706	$ 374
Preferred stock, par value (in dollars per share)		$ 0.0001
Preferred Stock, shares authorized (in shares)		10,000,000
Preferred stock, shares issued (in shares)		0
Preferred stock, shares outstanding (in shares)		0
Common stock, par value (in dollars per share)			$ 0.0001
Common Stock, shares authorized (in shares)			46,000,000
Common stock, shares issued (in shares)			18,652,960
Common stock, shares outstanding (in shares)			16,697,109
Series A convertible preferred stock
Preferred stock, par value (in dollars per share)			$ 0.0001
Preferred Stock, shares authorized (in shares)			2,690,403
Preferred stock, shares issued (in shares)			2,690,403
Preferred stock, shares outstanding (in shares)			2,690,403
Series A-1 convertible preferred stock
Preferred stock, par value (in dollars per share)			$ 0.0001
Preferred Stock, shares authorized (in shares)			1,600,000
Preferred stock, shares issued (in shares)			1,600,000
Preferred stock, shares outstanding (in shares)			1,600,000
Series B convertible preferred stock
Preferred stock, par value (in dollars per share)			$ 0.0001
Preferred Stock, shares authorized (in shares)			6,108,000
Preferred stock, shares issued (in shares)			6,108,000
Preferred stock, shares outstanding (in shares)			6,108,000
Series B-1 convertible preferred stock
Preferred stock, par value (in dollars per share)			$ 0.0001
Preferred Stock, shares authorized (in shares)			2,492,570
Preferred stock, shares issued (in shares)			2,449,700
Preferred stock, shares outstanding (in shares)			2,449,700
Series C convertible preferred stock
Preferred stock, par value (in dollars per share)			$ 0.0001
Preferred Stock, shares authorized (in shares)			6,989,863
Preferred stock, shares issued (in shares)			6,989,863
Preferred stock, shares outstanding (in shares)			6,989,863
Series D convertible preferred stock
Preferred stock, par value (in dollars per share)			$ 0.0001
Preferred Stock, shares authorized (in shares)			2,176,297
Preferred stock, shares issued (in shares)			2,176,297
Preferred stock, shares outstanding (in shares)			2,176,297
Class A common stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common Stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	43,761,312	41,714,870
Common stock, shares outstanding (in shares)	40,961,808	39,041,065
Class B common stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common Stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	10,081,127	9,803,933
Common stock, shares outstanding (in shares)	9,927,749	9,803,933

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue
Total revenue	$ 31,402	$ 24,763	$ 61,937	$ 48,142	$ 102,707	$ 78,813	$ 44,815
Cost of revenue
Total cost of revenue	8,320	6,214	16,528	12,059	28,154	20,994	9,995
Gross profit	23,082	18,549	45,409	36,083	74,553	57,819	34,820
Operating expenses
Research and development	7,712	6,424	14,993	12,776	28,059	25,426	16,664
Sales and marketing	14,184	11,728	28,078	22,180	55,584	35,980	25,165
General and administrative	9,528	11,277	21,624	17,361	38,178	17,185	14,994
Total operating expenses	31,424	29,429	64,695	52,317	121,821	78,591	56,823
Loss from operations	(8,342)	(10,880)	(19,286)	(16,234)	(47,268)	(20,772)	(22,003)
Interest expense	(96)	(77)	(191)	(129)	(270)	(617)	(24)
Interest income	53	90	513	195	307	35	117
Other income	101	131	203	280	490	442	0
Loss before income taxes	(8,284)	(10,736)	(18,761)	(15,888)	(46,741)	(20,912)	(21,910)
Income tax expense	18	19	21	30	66	22	0
Net loss	(8,302)	(10,755)	(18,782)	(15,918)	(46,807)	(20,934)	(21,910)
Comprehensive loss	$ (8,302)	$ (10,755)	$ (18,782)	$ (15,918)	$ (46,807)	$ (20,934)	$ (21,910)
Net loss per share attributable to common shareholders, basic and diluted (in dollars per share)	$ (0.16)	$ (0.64)	$ (0.37)	$ (0.95)	$ (2.54)	$ (1.26)	$ (1.34)
Weighted-average shares outstanding used to compute net loss per share, basic and diluted (in shares)	50,527,432	16,753,014	50,263,061	16,832,105	18,438,695	16,593,258	16,400,767
Subscription
Revenue
Total revenue	$ 31,190	$ 24,669	$ 61,519	$ 48,001	$ 102,243	$ 78,392	$ 44,685
Cost of revenue
Total cost of revenue	8,178	6,154	16,264	11,969	27,862	20,726	9,964
Professional services and other
Revenue
Total revenue	212	94	418	141	464	421	130
Cost of revenue
Total cost of revenue	$ 142	$ 60	$ 264	$ 90	$ 292	$ 268	$ 31

Consolidated Statements of Conv

Consolidated Statements of Convertible Preferred Stock and Stockholders’ (Deficit)/Equity Statement - USD ($) $ in Thousands	Total	Voting Common Stock	Additional Paid-in Capital	Series A, A-1, B, B-1, C and D Convertible Preferred Stock (in equity)	Treasury Stock	Accumulated Deficit	Series A, A-1, B, B-1 and C Convertible Redeemable Preferred Stock
Beginning balance (in shares) at Dec. 31, 2016							19,837,966
Beginning balance at Dec. 31, 2016							$ 62,671
Ending balance (in shares) at Dec. 31, 2017							19,837,966
Ending balance at Dec. 31, 2017							$ 62,671
Beginning balance (in shares) at Dec. 31, 2016		16,371,202		0	(1,973,851)
Beginning balance at Dec. 31, 2016	$ (35,174)	$ 1	$ 1,068	$ 0	$ (10,507)	$ (25,736)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		133,151
Exercise of stock options	143		144			(1)
Stock-based compensation expense	473		473
Net loss	(21,910)					(21,910)
Ending balance (in shares) at Dec. 31, 2017		16,504,353		0	(1,973,851)
Ending balance at Dec. 31, 2017	(56,468)	$ 1	1,685	$ 0	$ (10,507)	(47,647)
Increase (Decrease) in Temporary Equity [Roll Forward]
Reclassification of convertible preferred stock (in shares)				19,837,966			(19,837,966)
Reclassification of convertible preferred stock	62,671			$ 62,671			$ (62,671)
Ending balance (in shares) at Dec. 31, 2018							0
Ending balance at Dec. 31, 2018							$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		174,756
Exercise of stock options	106		106
Stock-based compensation expense	53		53
Reclassification of convertible preferred stock (in shares)				19,837,966			(19,837,966)
Reclassification of convertible preferred stock	62,671			$ 62,671			$ (62,671)
Issuance of stock (in shares)				2,176,297
Issuance of stock	40,305			$ 40,305
Net loss	(20,934)					(20,934)
Ending balance (in shares) at Dec. 31, 2018		16,679,109		22,014,263	(1,973,851)
Ending balance at Dec. 31, 2018	25,733	$ 1	1,844	$ 102,976	$ (10,507)	(68,581)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		95,343
Exercise of stock options	45		45
Stock-based compensation expense	5,298		5,298
Net issuance of RSA grant (in shares)		242,155			192,281
Net issuance of RSA grant	(2,345)				$ (2,345)
Net loss	(15,918)					(15,918)
Ending balance (in shares) at Jun. 30, 2019		17,016,607		22,014,263	(2,166,132)
Ending balance at Jun. 30, 2019	12,813	$ 1	7,187	$ 102,976	$ (12,852)	(84,499)
Beginning balance (in shares) at Dec. 31, 2018							0
Beginning balance at Dec. 31, 2018							$ 0
Beginning balance (in shares) at Dec. 31, 2018		16,679,109		22,014,263	(1,973,851)
Beginning balance at Dec. 31, 2018	$ 25,733	$ 1	1,844	$ 102,976	$ (10,507)	(68,581)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	163,962	163,962
Exercise of stock options	$ 92		92
Stock-based compensation expense	25,333		25,333
Net issuance of common stock from equity award settlement (in shares)		1,164,134			699,954
Net issuance of common stock from equity award settlement	(9,923)				$ (9,923)
Issuance of stock (in shares)		8,823,530
Issuance of stock	133,702	$ 2	133,700
Conversion of convertible preferred stock to common stock in connection with initial public offering (in shares)		22,014,263		(22,014,263)
Conversion of convertible preferred stock to common stock in connection with initial public offering		$ 2	102,974	$ (102,976)
Net loss	(46,807)					(46,807)
Ending balance (in shares) at Dec. 31, 2019		48,844,998		0	(2,673,805)
Ending balance at Dec. 31, 2019	128,130	$ 5	263,943	$ 0	$ (20,430)	(115,388)
Beginning balance (in shares) at Mar. 31, 2019		16,686,504		22,014,263	(1,973,851)
Beginning balance at Mar. 31, 2019	20,576	$ 1	1,850	$ 102,976	$ (10,507)	(73,744)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		87,948
Exercise of stock options	39		39
Stock-based compensation expense	5,298		5,298
Net issuance of RSA grant (in shares)		242,155			192,281
Net issuance of RSA grant	(2,345)				$ (2,345)
Net loss	(10,755)					(10,755)
Ending balance (in shares) at Jun. 30, 2019		17,016,607		22,014,263	(2,166,132)
Ending balance at Jun. 30, 2019	12,813	$ 1	7,187	$ 102,976	$ (12,852)	(84,499)
Beginning balance (in shares) at Dec. 31, 2019		48,844,998		0	(2,673,805)
Beginning balance at Dec. 31, 2019	128,130	$ 5	263,943	$ 0	$ (20,430)	(115,388)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		708,086
Exercise of stock options	280		280
Stock-based compensation expense	6,003		6,003
Net issuance of common stock from equity award settlement (in shares)		679,910
Net issuance of common stock from equity award settlement	0
Taxes paid related to net share settlement of equity awards (in shares)					270,732
Taxes paid related to net share settlement of equity awards	(6,335)				$ (6,335)
Issuance of stock (in shares)		629,603
Issuance of stock	9,738		9,738
Exercise of warrants (in shares)		26,960			8,345
Exercise of warrants	0		140		$ (140)
Net loss	(18,782)					(18,782)
Ending balance (in shares) at Jun. 30, 2020		50,889,557			(2,952,882)
Ending balance at Jun. 30, 2020	119,034	$ 5	280,104		$ (26,905)	(134,170)
Beginning balance (in shares) at Mar. 31, 2020		50,349,964			(2,841,959)
Beginning balance at Mar. 31, 2020	127,970	$ 5	277,485		$ (23,652)	(125,868)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		364,404
Exercise of stock options	138		138
Stock-based compensation expense	2,481		2,481
Net issuance of common stock from equity award settlement (in shares)		175,189
Net issuance of common stock from equity award settlement	0
Taxes paid related to net share settlement of equity awards (in shares)					110,923
Taxes paid related to net share settlement of equity awards	(3,253)				$ (3,253)
Net loss	(8,302)					(8,302)
Ending balance (in shares) at Jun. 30, 2020		50,889,557			(2,952,882)
Ending balance at Jun. 30, 2020	$ 119,034	$ 5	$ 280,104		$ (26,905)	$ (134,170)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	6 Months Ended		12 Months Ended
Consolidated Statements of Cash Flows - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net loss	$ (18,782,000)	$ (15,918,000)	$ (46,807,000)	$ (20,934,000)	$ (21,910,000)
Adjustments to reconcile net loss to net cash (used in) operating activities
Depreciation of property and equipment	1,434,000	1,335,000	2,736,000	2,441,000	1,233,000
Amortization of line of credit issuance costs	118,000	98,000	194,000	128,000	11,000
Amortization of premium on investments	51,000	0
Amortization of acquired intangible assets	713,000	771,000	1,532,000	1,545,000	121,000
Amortization of deferred commissions	3,414,000	2,126,000	4,812,000	2,795,000	1,358,000
Amortization of right-of-use operating lease asset	687,000	587,000	1,056,000
Stock-based compensation expense	6,003,000	5,298,000	25,333,000	53,000	473,000
Provision for accounts receivable allowances	1,340,000	685,000	2,208,000	793,000	86,000
Changes in operating assets and liabilities
Accounts receivable	(4,330,000)	643,000	(2,756,000)	(4,940,000)	(2,514,000)
Prepaid expenses and other current assets	807,000	(876,000)	(2,657,000)	(1,242,000)	(599,000)
Deferred commissions	(5,417,000)	(2,748,000)	(8,170,000)	(6,964,000)	(3,063,000)
Accounts payable and accrued expenses	942,000	(660,000)	1,430,000	1,761,000	3,875,000
Deferred revenue	5,690,000	2,848,000	8,235,000	7,162,000	5,404,000
Lease liabilities	(1,215,000)	(629,000)	(1,560,000)	0	0
Deferred rent				164,000	1,180,000
Net cash (used in) operating activities	(8,545,000)	(6,440,000)	(14,414,000)	(17,238,000)	(14,345,000)
Cash flows from investing activities
Purchases of property and equipment	(808,000)	(375,000)	(760,000)	(2,097,000)	(673,000)
Acquisition of businesses, net of cash acquired			0	0	(11,843,000)
Purchases of marketable securities	(49,722,000)	0
Net cash (used in) investing activities	(50,530,000)	(375,000)	(760,000)	(2,097,000)	(12,516,000)
Cash flows from financing activities
Proceeds from underwriters' purchase of over-allotment shares, related to the Company's initial public offering, net of underwriters’ discounts and commissions	9,954,000	0	139,500,000	0	0
Proceeds from line of credit			0	11,000,000	3,000,000
Repayments of line of credit			0	(14,000,000)	0
Proceeds from Issuance of Convertible Preferred Stock			0	40,305,000	0
Payments for line of credit issuance costs	(126,000)	(47,000)	(148,000)	(163,000)	(116,000)
Proceeds from exercise of stock options	280,000	45,000	92,000	106,000	143,000
Employee taxes paid related to the net share settlement of stock-based awards	(6,335,000)	0	(9,923,000)	0	0
Payments of deferred offering costs	(216,000)	(529,000)	(5,227,000)	0	0
Net cash provided by (used in) financing activities	3,557,000	(531,000)	124,294,000	37,248,000	3,027,000
Net increase (decrease) in cash and cash equivalents	(55,518,000)	(7,346,000)	109,120,000	17,913,000	(23,834,000)
Cash and cash equivalents
Beginning of period	135,310,000	26,190,000	26,190,000	8,277,000	32,111,000
End of period	79,792,000	18,844,000	135,310,000	26,190,000	8,277,000
Supplemental noncash disclosures
Cash paid for interest			76,000	489,000	81,000
Cash paid for income taxes			22,000	0	0
Operating lease liability arising from operating ROU asset obtained	5,417,000	0
Property and equipment acquired under lease incentives	101,000	0	0	927,000	5,394,000
Noncash exercise of stock warrants	140,000	0
Deferred offering costs, accrued but not yet paid	0	1,236,000	$ 573,000	$ 0	$ 0
Employee taxes related to the net share settlement of stock-based awards, accrued but not yet paid	0	2,345,000
Balance of property and equipment in accounts payable	$ 551,000	$ 0

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Summary of Significant Accounting Policies	Nature of Operations and Summary of Significant Accounting Policies Nature of Operations Sprout Social, Inc. (“Sprout Social” or the “Company”), a Delaware corporation, began operating on April 21, 2010 to design, develop and operate a web-based comprehensive social media management tool enabling companies to manage and measure their online presence. Customers access their accounts online via a web-based interface or a mobile application. Some customers also purchase the Company’s professional services, which primarily consist of consulting and training services. The Company’s fiscal year end is December 31. The Company’s customers are primarily located throughout the United States, and a portion of customers are located in foreign countries. The Company is headquartered in Chicago, Illinois. Over-allotment Offering On January 15, 2020, the Company completed an equity offering in which it issued and sold 629,603 shares of Class A common stock for total net proceeds of $10.0 million after deducting underwriting discounts and commissions, as a result of the over-allotment option exercise by the underwriters of the Company’s initial public offering. Principles of Consolidation and Basis of Presentation The unaudited condensed consolidated financial statements and accompanying notes were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and the applicable regulations of the United States Securities and Exchange Commission (“SEC”) regarding interim financial reporting. The Company has prepared the unaudited condensed consolidated financial statements on a basis substantially consistent with the audited consolidated financial statements of the Company as of and for the year ended December 31, 2019 , and these unaudited condensed consolidated financial statements include all normal recurring adjustments necessary for a fair statement of the results of the interim periods presented but are not necessarily indicative of the results of operations to be anticipated for the full year or any future period. The consolidated balance sheet as of December 31, 2019 included herein was derived from the audited consolidated financial statements as of that date but does not include all disclosures including certain disclosures required by GAAP on an annual basis. The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 , filed with the SEC on February 28, 2020. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The Company bases its estimates on historical experience and on other assumptions that its management believes are reasonable under the circumstances, including but not limited to the potential impacts arising from the COVID-19 pandemic. As the extent and duration of the impact of the COVID-19 pandemic remains uncertain, the Company’s estimates and judgments may evolve as conditions change. The Company is not aware of any events or circumstances that would require an update to its estimates and judgments or a revision of the carrying value of its assets or liabilities as of August 6, 2020, the date of issuance of these financial statements. Actual results could differ from those estimates. The Company’s most significant estimates and judgments are those related to the estimated period of benefit for incremental costs of obtaining a contract with a customer, the incremental borrowing rate for operating leases, calculation of allowance for doubtful accounts, useful lives of long-lived assets, stock-based compensation, income taxes, commitments and contingencies and litigation, among others. Summary of Significant Accounting Policies The Company’s significant accounting policies are discussed in Note 1, “Nature of Operations and Summary of Significant Accounting Policies” in the Notes to Consolidated Financial Statements as of and for the year ended December 31, 2019 included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 , filed with the SEC on February 28, 2020 . There have been no significant changes to these policies during the six months ended June 30, 2020 , except as noted below. Marketable Securities Marketable securities consist of corporate bonds, commercial paper, and U.S. Treasury securities. The Company classifies marketable securities as available-for-sale at the time of purchase and reevaluates such classification as of each balance sheet date. All marketable securities are recorded at their estimated fair values. Unrealized gains and losses for the available-for-sale debt securities that are unrelated to credit loss factors are recorded in accumulated other comprehensive income (loss), or AOCI. As of June 30, 2020 and December 31, 2019, the Company’s AOCI bal ance was insignificant. Unrealized losses determined to be credit-related are recorded as Other income in the consolidated statements of operations and comprehensive loss and as an allowance for credit losses on Marketable securities on the consolidated balance sheet. As of June 30, 2020, the gross unrealized loss on available-for-sale debt securities was immaterial and there were no expected credit losses related to the Company's available-for-sale debt securities. Recently Adopted Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, including subsequent amendments, Measurement of Credit Losses on Financial Instruments (Topic 326) (“ASU 2016-13”), which modifies the accounting methodology for most financial instruments by establishing a new “expected loss model” that requires entities to estimate current expected credit losses on financial instruments, including trade accounts receivable, by using all practical and relevant information. This guidance is effective for interim and annual periods beginning after December 15, 2019. The Company adopted the ASU as of January 1, 2020, and the adoption did not have a material impact on the Company’s condensed consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other-Internal-Use Software	Nature of Operations and Summary of Significant Accounting Policies Nature of Operations Sprout Social, Inc. (“Sprout Social” or the “Company”), a Delaware corporation, began operating on April 21, 2010 to design, develop and operate a web-based comprehensive social media management tool enabling companies to manage and measure their online presence. Customers access their accounts online via a web-based interface or a mobile application. Some customers also purchase the Company’s professional services, which primarily consist of consulting and training services. The Company’s fiscal year end is December 31. The Company’s customers are primarily located throughout the United States, and a portion of customers are located in foreign countries. The Company is headquartered in Chicago, Illinois. Initial Public Offering On December 17, 2019, the Company completed its initial public offering or “IPO” in which it issued and sold 8,823,530 shares of Class A common stock at a price to the public of $17.00 per share. The shares sold and issued in the IPO resulted in an aggregate gross offering price of $150.0 million . The Company received net proceeds of $134.3 million after deducting underwriting discounts and commissions of $10.5 million and offering expenses of $5.2 million . Immediately prior to the closing of the IPO, all shares of outstanding convertible preferred stock automatically converted into an aggregate of 22,014,263 shares of Class A common stock. In addition, the Company authorized 1,000,000,000 Class A common shares, 25,000,000 Class B common shares and 10,000,000 shares of preferred stock for future issuance. Principles of Consolidation and Basis of Presentation The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The consolidated financial statements and accompanying notes were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The Company bases its estimates on historical experience and on other assumptions that its management believes are reasonable under the circumstances. Actual results could differ from those estimates. The Company’s most significant estimates and judgments are those related to the estimated period of benefit for incremental costs of obtaining a contract with a customer, the incremental borrowing rate for operating leases, calculation of allowance for doubtful accounts, valuation of assets and liabilities acquired as part of business combinations, useful lives of long-lived assets, stock-based compensation, income taxes, commitments and contingencies and litigation, among others. Segment Information The Company operates as one operating segment. The Company’s chief operating decision maker (“CODM”) is its chief executive officer, who reviews financial information for purposes of making operating decisions, assessing financial performance and allocating resources. The Company’s CODM evaluates financial information on a consolidated basis. As the Company operates as one operating segment, all required segment financial information is found in the consolidated financial statements. Fair Value of Financial Instruments The Company has the following financial instruments: cash, cash equivalents, accounts receivable, accounts payable and accrued liabilities. The carrying value of the Company’s cash equivalents, accounts receivable, accounts payable and accrued liabilities approximates fair value due to their short-term nature. Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents. Cash and cash equivalents are recorded at cost, which approximates fair value. Interest earned on cash and cash equivalents is recorded as interest income in the consolidated statement of operations. Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable primarily consist of amounts billed and currently due from customers, net of an allowance for doubtful accounts. Subscription fees billed in advance of the related subscription term represent contract liabilities and are presented as accounts receivable and deferred revenues upon establishment of an unconditional right to payment under non-cancellable contracts. Our typical payment terms provide for customer payment within 30 days of the date of the contract. Accounts receivable are subject to collection risk. The Company performs evaluations of its customers’ financial positions and generally extends credit on account, without collateral. The Company determines the need for an allowance for doubtful accounts based upon various factors, including past collection experience, credit quality of the customer, age of the receivable balance and current economic conditions. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. Amounts are charged against the allowance for doubtful accounts once collection efforts are unsuccessful. Bad debt expense was $2.2 million , $0.8 million and $0.1 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. The allowance for doubtful accounts was $0.7 million and $0.4 million as of December 31, 2019 and 2018 , respectively. The activity related to the allowance for doubtful accounts for the year ended December 31, 2019 was as follows (in thousands): Balance at December 31, 2018 $ 374 Additions 1,920 Write-offs, net of recoveries (1,588 ) Balance at December 31, 2019 $ 706 The activity related to the allowance for doubtful accounts for the years ended December 31, 2018 and 2017 was immaterial. Concentration of Credit Risk Financial instruments that potentially expose the Company to concentrations of credit risk are primarily cash and accounts receivable. The Company maintains cash balances that may exceed the insured limits by the Federal Deposit Insurance Corporation. The Company has not experienced any losses on its deposits of cash. The Company has credit risk regarding trade accounts receivable as the Company generally does not require collateral. Allowances are maintained for potential credit losses. As of December 31, 2019 and 2018 , there were no individual customers that accounted for more than 10% of the Company’s total revenue or net accounts receivable. Property and Equipment Property and equipment are recorded at cost, net of accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the following estimated useful lives: Computer equipment and hardware 3-5 years Furniture and fixtures 3-7 years Leasehold improvements Lesser of useful life or remaining lease term Maintenance and repairs that do not improve or extend the lives of the respective assets are expensed as incurred. Upon retirement or sale, the cost of assets disposed and the related accumulated depreciation are written off, and any resulting gain or loss is credited or charged to income. Goodwill Goodwill consists of the excess purchase price over the fair value of net assets acquired in purchase business combinations. The Company conducts a test for the impairment of goodwill on at least an annual basis as of October 1 st or sooner if indicators of impairment arise. The Company first assesses qualitative factors to determine whether it is more likely than not that goodwill is impaired. As part of the qualitative assessment, the Company evaluates factors including macroeconomic conditions, industry and market considerations, cost factors and overall financial performance of its reporting unit. If the Company concludes that it is more-likely-than-not that its single reporting unit is impaired or if the Company elects not to perform the optional qualitative assessment, a quantitative assessment is performed. For the quantitative assessment, the fair value of the Company’s reporting unit is compared with the carrying amount of net assets, including goodwill, related to the reporting unit. The Company recognizes an impairment charge for the amount, if any, by which the carrying amount of a reporting unit exceeds the fair value of the reporting unit. The Company recorded no impairment loss during the years ended December 31, 2019 and 2018 . Impairment of Long-Lived Assets The Company evaluates the recoverability of its long-lived assets, which includes property and equipment and intangible assets, whenever events or circumstances indicate that the carrying amount of these assets may not be recoverable. Recoverability of an asset is measured by comparison of its carrying amount to the anticipated future undiscounted cash flows that the asset is expected to generate. If that comparison indicates that the carrying amount is not recoverable, an impairment loss is recorded in the amount by which the carrying amount of the asset exceeds its fair value. The Company recorded no impairment loss during the years ended December 31, 2019 and 2018 . Revenue Recognition The Company generates revenues from subscriptions to the Company’s web-based social media management platform under a software-as-a-service model. Our subscriptions can range from monthly to one-year or multi-year arrangements and are generally non-cancellable. The Company’s customers do not have the right to take possession of the online software solution. The Company commences revenue recognition when control of these products is transferred to customers in an amount that reflects the consideration the Company expects to be entitled to in exchange for such products. The Company determines revenue recognition through the following steps: • identify the contract with a customer; • identify the performance obligations in a contract; • determination of the transaction price; • allocate the transaction price to the performance obligations identified in the contract; and • recognize revenue when (or as) performance obligations are satisfied. Identify the contract with a customer A customer contract is generally identified when the Company and a customer have executed an agreement or online acceptance that requires the Company to grant access to its online software products and provide professional services in exchange for consideration from the customer. Identify the performance obligations in a contract A performance obligation is a promise to provide a distinct service or a series of distinct services. A service that is promised to a customer is distinct if the customer can benefit from the service either on its own or together with other readily available resources, and a company’s promise to transfer the service to the customer is separately identifiable from other promises in the contract. The Company has determined that subscriptions for its online software products are a distinct performance obligation, because no implementation work is required and the online software product is fully functional once a customer has access. In addition, the Company sells professional services consisting of, but not limited to, implementation fees, specialized training, one-time reporting services and recurring periodic reporting services. Professional services are distinct, as they are sold separately, and the customer can benefit from the services to make better use of the online product purchased. Determination of the transaction price The transaction price is the amount of consideration to which the Company expects to be entitled in exchange for transferring goods or services to a customer. The Company estimates any variable consideration it will be entitled at contract inception and will reassess as circumstances change, when determining the transaction price. The transaction price for subscription and professional services is generally fixed at contract inception; therefore, the Company’s contracts do not contain a significant amount of variable consideration. As a result, the amount of revenue recognized in the periods presented from performance obligations satisfied (or partially satisfied) in previous periods due to changes in the transaction price was not material. Allocate the transaction price to the performance obligations identified in the contract If the contract contains a single performance obligation, the Company allocates the entire transaction price to the single performance obligation. For contracts containing multiple performance obligations, the transaction price is allocated to each performance obligation based on the relative standalone selling price (“SSP”) of the services provided to the customer. The Company determines the SSP based upon the prices at which the Company separately sells subscription and various professional services, and based on the Company’s overall pricing objectives, taking into consideration market conditions, value of the Company’s contracts, the types of offerings sold, customer demographics and other factors. Recognize revenue when (or as) performance obligations are satisfied Subscription revenues are recognized ratably over the contract terms beginning on the date the Company’s service is made available to customers, which typically begins on the commencement date of each contract as no implementation work is required. The Company’s customers do not have the right to take possession of the online software solution. The Company’s subscription service arrangements are generally non-cancellable and do not provide for refund of subscription fees. Professional services are typically provided for a fixed fee, and revenues are recognized over time for these contracts as services are provided to the customer. Professional services revenue represents less than 1% of revenue for the periods presented. Sales Commissions Sales force commissions are considered incremental costs of obtaining a contract with a customer. Sales commissions are paid on initial contracts with new customers and for expansion of contracts with existing customers. No commissions are paid on customer renewals. Sales commissions are deferred and amortized on a straight-line basis over a period of benefit of three years, as determined by the Company. The Company determined the three-year period by taking into consideration the products sold, expected customer life, expected contract renewals, technology life cycle and other factors. Amortization expense is included as a component of sales and marketing expense. Deferred commissions during the year ended December 31, 2019 increased $3.3 million as a result of deferring incremental costs of obtaining contracts with customers of $8.1 million , which was offset by $4.8 million of amortization. Deferred commissions during the year ended December 31, 2018 increased $4.2 million as a result of deferring incremental costs of obtaining contracts with customers of $7.0 million , which was offset by $2.8 million of amortization. The Company periodically reviews the deferred sales commissions for impairment and noted no impairment loss for the years ended December 31, 2019 and 2018 . Cost of Revenues Cost of revenues primarily consist of expenses related to hosting the Company’s service and providing support to customers, depreciation associated with computers and hardware and amortization expense related to acquired developed technologies. These expenses are comprised of hosted data center global costs, fees paid to third-party data providers and personnel-related costs directly associated with cloud infrastructure and customer support, including salaries, benefits, bonuses and allocated overhead. Overhead associated with facilities and information technology is allocated to cost of revenue and operating expenses based on headcount. Advertising Costs Advertising costs primarily include online advertising on search engines. Advertising costs are expensed as incurred and included as a component of sales and marketing expenses. The Company incurred approximately $2.4 million , $1.5 million and $4.6 million in advertising costs during the years ended December 31, 2019 , 2018 and 2017 , respectively. Research and Development Costs Costs incurred in research and development are expensed as incurred and consist primarily of payroll, employee benefits, allocated overhead and other expenses associated with product development. Stock-Based Compensation The Company recognizes compensation expense for equity awards based on the grant‐date fair value over the remaining requisite service period for the award. For awards subject to graded vesting, the compensation expense recognized is at least equal to the vested portion of the award. The Company uses the Black‐Scholes option pricing model to measure the fair value of the option awards. The Company sets the exercise price at the estimated fair‐market value at the date of the grant. Management utilized third‐party valuations to assist with the determination of the Company’s estimated fair‐market value and common stock price prior to completion of its IPO on December 17, 2019. The exercise price affects the fair value of the option award in the Black‐Scholes option pricing model. The grant-date fair value of RSUs that contain a market condition is determined using a Monte Carlo valuation model. The Company recognizes forfeitures as they occur. Leases The Company determines if an arrangement is a lease at inception, and all significant lease arrangements are generally recognized at lease commencement. Operating lease right-of-use, or ROU, assets and operating lease liabilities are recognized at commencement based on the present value of fixed payments not yet paid over the remaining lease term. ROU assets also include any initial indirect costs incurred and any lease payments made at or before the lease commencement date, less lease incentives received. For short-term leases of 12 months or less, no ROU asset or lease liability is recorded. The Company records rent expense in its condensed consolidated statement of operations and comprehensive loss on a straight-line basis over the term of the lease and records variable lease payments as incurred. Additionally, the Company has elected to combine lease and non-lease components and account for them as a single component. ROU assets represent the Company’s right to use an underlying asset during the lease term, and lease liabilities represent its obligations to make lease payments arising from the lease. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that it will exercise the option. The Company uses its incremental borrowing rate in determining the lease liabilities, as its leases generally do not provide an implicit rate. The incremental borrowing rate is an estimate of the collateralized borrowing rate the Company would incur on future lease payments over a similar term based on the information available at the commencement date. The Company does not have any finance leases. Commitments and Contingencies The Company evaluates all pending or threatened commitments and contingencies, if any, that are reasonably likely to have a material effect on its operations or financial position. The Company assesses the probability of an adverse outcome and records a provision for a liability when management believes that it is probable that a liability has been incurred and the amount can be reasonably estimated. Income Taxes The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. The Company recognizes deferred tax assets to the extent that these assets are believed to be more likely than not to be realized. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts that are more likely than not expected to be realized. In making such a determination, all available positive and negative evidence is considered, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies and results of recent operations. Tax benefits for uncertain tax positions are based upon management’s evaluation of the information available at the reporting date. To be recognized in the financial statements, a tax benefit must be at least more-likely-than-not of being sustained based on technical merits. The benefit for positions meeting the recognition threshold is measured as the largest benefit more-likely-than-not of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The Company’s policy is to recognize interest and penalties related to the underpayment of income taxes as a component of provision for income taxes. Accrued interest and penalties are included on the related tax liability line in the consolidated balance sheets, as applicable. The Company files income tax returns in the U.S. federal jurisdiction, Illinois and other state jurisdictions. It is difficult to predict the final timing and resolution of any particular uncertain tax position. Based on the Company’s assessment of many factors, including past experience and complex judgments about future events, the Company does not currently anticipate significant changes in its uncertain tax positions over the next 12 months. Deferred Offering Costs Deferred offering costs of $5.8 million , primarily consisting of certain legal, accounting and other third-party fees that were directly associated with the IPO, were recorded in stockholders’ equity as a reduction of additional paid-in capital generated upon closing of the IPO on December 17, 2019. Net Loss per Share The Company calculates basic net loss per share by dividing net loss attributable to common shareholders by the weighted-average number of the Company’s common stock shares outstanding during the respective period. Net loss attributable to common shareholders is net loss minus convertible preferred stock dividends declared, of which there were none during the periods presented. The Company calculates diluted net loss per share using the treasury stock and if-converted methods, which consider the potential impacts of outstanding stock options, RSUs, warrants and convertible preferred stock. Under these methods, the numerator and denominator of the net loss per share calculation are adjusted for these securities if the impact of doing so increases net loss per share. During the periods presented, the impact is to decrease net loss per share and therefore the Company is precluded from adjusting its calculation for these securities. As a result, diluted net loss per share is calculating using the same formula as basic net loss per share. Recently Adopted Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases (“ASU 2016 02”), including subsequent amendments. ASU 2016-02 requires lessees to record a ROU asset and lease liability for almost all leases. This ASU does not substantially impact lessor accounting. The Company adopted the standard on January 1, 2019 using a modified retrospective approach of applying the new standard at the adoption date. Under this approach, the Company will continue to report comparative periods presented in the period of adoption under ASC 840. The Company has elected the package of practical expedients permitted under the transition guidance within the new standard, which does not require it to reassess 1) whether any expired or existing contracts contain leases, 2) the lease classification of any expired or existing leases or 3) any initial direct costs for any existing leases. Adoption of this standard resulted in recognition of ROU assets of $6.7 million , short-term lease liabilities of $1.8 million , long-term lease liabilities of $20.3 million , a decrease in accrued expenses and other of $0.7 million and a decrease in deferred rent, net of current portion of $14.7 million , with no impact on retained earnings as of January 1, 2019. The adoption of the standard is not expected to have a significant impact on the Company’s condensed consolidated statement of operations. See Note 5 for further details.

Revenue Recognition

Revenue Recognition	6 Months Ended	12 Months Ended
Revenue Recognition	Jun. 30, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition Disaggregation of Revenue The Company provides disaggregation of revenue based on geographic region in Note 7 and based on the subscription versus professional services and other classification on the condensed consolidated statements of operations and comprehensive loss, as it believes these best depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. Deferred Revenue Deferred revenue is recorded upon establishment of unconditional right to payment under non-cancelable contracts and is recognized as the revenue recognition criteria are met. The Company generally invoices customers in advance in monthly, quarterly, semi-annual and annual installments. The deferred revenue balance is influenced by several factors, including the compounding effects of renewals, invoice duration, timing and size. The amount of revenue recognized during the three months ended June 30, 2020 and 2019 that was included in deferred revenue at the beginning of each period was $16.4 million and $11.4 million , respectively. The amount of revenue recognized during the six months ended June 30, 2020 and 2019 that was included in deferred revenue at the beginning of each period was $22.3 million and $16.6 million , respectively. As of December 31, 2019 , including amounts already invoiced and amounts contracted but not yet invoiced, $42.1 million of revenue was expected to be recognized from remaining performance obligations, of which 91% is expected to be recognized in the next 12 months , with the remainder expected to be recognized the following year. As of June 30, 2020 , including amounts already invoiced and amounts contracted but not yet invoiced, $50.9 million of revenue is expected to be recognized from remaining performance obligations, of which 86% is expected to be recognized in the next 12 months	Revenue Recognition Disaggregation of Revenue The Company provides disaggregation of revenue based on geographic region in Note 11 and based on the subscription versus professional services and other classification on the consolidated statements of operations and comprehensive loss, as it believes these best depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. Deferred Revenue Deferred revenue is recorded upon establishment of unconditional right to payment under non-cancellable contracts for subscription and professional services described above and is recognized as the revenue recognition criteria are met. The Company generally invoices customers in advance in monthly, quarterly, semi-annual and annual installments. The deferred revenue balance is influenced by several factors, including the compounding effects of renewals, invoice duration, timing and size. Deferred revenue during the year ended December 31, 2019 , increased $8.3 million as a result of $111.0 million of additional invoicing which was offset by $102.7 million of revenue recognized during the same period. Deferred revenue during the year ended December 31, 2018 , increased $7.2 million as a result of $86.0 million of additional invoicing which was offset by $78.8 million of revenue recognized during the same period. The amount of revenue recognized during the years ended December 31, 2019 and 2018 that was included in deferred revenue at the beginning of each period was $20.9 million and $14.1 million , respectively. As of December 31, 2019 , including amounts already invoiced and amounts contracted but not yet invoiced, $42.1 million of revenue is expected to be recognized from remaining performance obligations, of which 91% is expected to be recognized in the next 12 months , with the remainder expected to be recognized the following year.

Property and Equipment

Property and Equipment	12 Months Ended
Property and Equipment	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment As of the dates specified below, property and equipment consisted of the following (in thousands): As of December 31, 2019 2018 Leasehold improvements $ 15,075 $ 15,045 Furniture and fixtures 3,630 3,498 Computer equipment and hardware 1,926 1,590 Total property and equipment 20,631 20,133 Less: Accumulated depreciation (7,102 ) (4,609 ) Total property and equipment, net $ 13,529 $ 15,524 The Company recognized depreciation expense on property and equipment of $2.7 million , $2.4 million and $1.2 million for the years ended December 31, 2019 , 2018 and 2017

Intangible Assets

Intangible Assets	12 Months Ended
Intangible Assets	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets As of the dates specified below, intangible assets, net consisted of the following (in thousands): As of December 31, 2019 2018 Customer relationships $ 7,300 $ 7,300 Trademark 120 120 Technology platform 1,150 1,150 Noncompetition agreement 110 110 8,680 8,680 Less: Accumulated amortization Customer relationships (2,169 ) (1,126 ) Trademark (120 ) (65 ) Technology platform (799 ) (415 ) Noncompetition agreement (110 ) (60 ) (3,198 ) (1,666 ) Intangible assets, net $ 5,482 $ 7,014 Amortization of intangible assets totaled $1.5 million for each of the years ended December 31, 2019 and 2018 and $0.1 million for 2017 . The expected future amortization of intangible assets as of December 31, 2019 is summarized as follows (in thousands): Years Ending December 31, Amortization Expense 2020 $ 1,394 2021 1,043 2022 1,043 2023 1,043 2024 959 $ 5,482 Intangible assets are all amortizable and have weighted-average amortization periods as follows: Intangible assets Years Customer relationships 7 Trademark 2 Technology platform 3 Noncompetition agreement 2

Operating Leases

Operating Leases	6 Months Ended	12 Months Ended
Operating Leases	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Leases	Operating Leases The Company entered into operating lease agreements for offices in Chicago, Illinois, San Francisco, California, and Seattle, Washington. The operating leases require escalating monthly rental payments ranging from $17,000 to $280,000 . Under the terms of the lease agreements, the Company is also responsible for its proportionate share of taxes and operating costs, which are treated as variable lease costs. The Chicago lease expires in January 2028 and the Seattle lease expired in July 2020. The San Francisco lease expired in June 2019. The Company’s operating leases typically contain options to extend or terminate the term of the lease. The Company currently does not include any options to extend leases in its lease terms as it is not reasonably certain to exercise them. As such, it has recorded lease obligations only through the initial optional termination dates above. On January 21, 2020, the Company entered into a new lease agreement for an office in Seattle, Washington with an expected total future commitment of $7.9 million , expected lease commencement date in August 2020 and is expected to expire in November 2030. For accounting purposes under ASC 842, the lease commenced on January 23, 2020, resulting in the recording of a $5.4 million right-of-use operating lease asset and operating lease liability. The following table provides a summary of operating lease assets and liabilities as of June 30, 2020 (in thousands): Assets Operating lease right-of-use assets $ 10,443 Liabilities Operating lease liabilities 1,941 Operating lease liabilities, non-current 22,889 Total operating lease liabilities $ 24,830 The following table provides information about leases on the condensed consolidated statements of operations and comprehensive loss (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Operating lease expense $ 733 $ 592 $ 1,407 $ 1,202 Variable lease expense 806 858 1,582 1,681 Sublease income 102 131 203 280 Within the condensed consolidated statements of operations and comprehensive loss, operating and variable lease expense are recorded in General and administrative expenses and sublease income is recorded in Other income. Cash payments related to operating leases for the six months ended June 30, 2020 and June 30, 2019 were $3.2 million and $2.7 million , respectively. A s of June 30, 2020 , the weighted-average remaining lease term is 8.2 years and the weighted-average discount rate is 5.7% . R emaining maturities of operating lease liabilities as of June 30, 2020 are as follows (in thousands): Years ending December 31, 2020 $ 1,536 2021 3,840 2022 3,930 2023 4,021 2024 4,117 Thereafter 16,353 Total future minimum lease payments $ 33,797 Less: imputed interest (6,971 ) Less: lease incentives (1) (1,996 ) Total operating lease liabilities $ 24,830 _________________ (1) Includes lease incentives that will be realized in 2020.	Operating Leases The Company entered into operating lease agreements for offices in Chicago, Illinois, San Francisco, California, and Seattle, Washington. The operating leases require escalating monthly rental payments ranging from $17,000 to $280,000 . Under the terms of the lease agreements, the Company is also responsible for its proportionate share of taxes and operating costs, which are treated as variable lease costs. The Chicago and Seattle leases expire in January 2028 and July 2020, respectively. The San Francisco lease expired in June 2019. The Company’s operating leases typically contain options to extend or terminate the term of the lease. The Company currently does not include any options to extend leases in its lease terms as it is not reasonably certain to exercise them. As such, it has recorded lease obligations only through the initial optional termination dates above. On January 21, 2020, the Company entered into a new lease agreement for an office in Seattle, Washington with an expected total future commitment of $10.0 million , expected lease commencement date in August 2020 and is expected to expire in December 2030. The following table provides a summary of operating lease assets and liabilities as of December 31, 2019 (in thousands): Assets Operating lease right-of-use assets $ 5,618 Liabilities Operating lease liabilities 2,331 Operating lease liabilities, non-current 18,196 Total operating lease liabilities $ 20,527 Operating lease expense for the year ended December 31, 2019 was $2.3 million . Variable lease costs for the year ended December 31, 2019 was $2.8 million . Rent expense recorded under ASC 840 for the year ended December 31, 2018 and 2017 was $4.7 million and $2.2 million , respectively. Cash payments related to operating leases for the year ended December 31, 2019 were $5.6 million . The Company recognized $0.5 million and $0.4 million of sublease rental income in other income on the consolidated statement of operations in 2019 and 2018 , respectively. There was no sublease rental income recognized in 2017. As of December 31, 2019 , the weighted-average remaining lease term is 7.9 years and the weighted-average discount rate is 6.0% . Remaining maturities of operating lease liabilities as of December 31, 2019 are as follows (in thousands): Years ending December 31, 2020 $ 3,474 2021 2,969 2022 3,033 2023 3,097 2024 3,165 Thereafter 10,108 Total future minimum lease payments $ 25,846 Less: imputed interest $ (5,319 ) Total operating lease liabilities $ 20,527 Future minimum lease payments under ASC 840 for non-cancellable operating leases as of December 31, 2018 was as follows (in thousands): Years ending December 31, 2019 $ 2,889 2020 3,474 2021 2,969 2022 3,033 2023 3,097 Thereafter 13,424 Total future minimum lease payments $ 28,886

Income Taxes

Income Taxes	6 Months Ended	12 Months Ended
Income Taxes	Jun. 30, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes for interim periods is generally determined using an estimate of the Company’s annual effective tax rate, excluding jurisdictions for which no tax benefit can be recognized due to valuation allowances. The Company’s effective tax rate generally differs from the U.S. federal statutory rate primarily due to a valuation allowance related to the Company’s federal and state deferred tax assets. The Company accounts for Global Intangible Low–Taxed Income (“GILTI”) as a current-period expense when incurred. Therefore, the Company has not recorded deferred taxes for basis differences expected to reverse in the future periods. There has historically been no federal or state provision for income taxes because the Company has historically incurred operating losses and maintains a full valuation allowance against its net deferred tax assets. For the six months ended June 30, 2020 , the Company recognized an immaterial provision related to foreign income taxes. The Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”) was enacted on March 27, 2020 by the United States. We are continuing to analyze the CARES Act, but it did not have a material impact on our provision for income taxes for the quarter ended June 30, 2020	Income Taxes The Company elected to account for Global Intangible Low–Taxed Income (“GILTI”) as a current-period expense when incurred. Therefore, the Company has not recorded deferred taxes for basis differences expected to reverse in the future periods. There has historically been no provision for income taxes because the Company has historically incurred operating losses and maintains a full valuation allowance against its net deferred tax assets. In 2019 and 2018 , the Company recognized an immaterial provision related to foreign income taxes. The components of loss before income taxes are as follows (in thousands): Year Ended December 31, 2019 2018 Domestic $ (45,106 ) $ (20,748 ) Foreign (1,635 ) (164 ) Loss before income taxes $ (46,741 ) $ (20,912 ) A reconciliation of the difference between the federal statutory rate and the effective income tax rate as a percentage of income before taxes for the years ended December 31, 2019 and 2018 is as follows (in thousands): Year Ended December 31, 2019 2018 Amount Tax Rate Amount Tax Rate Federal statutory income tax $ (9,801 ) 21.00 % $ (4,414 ) 21.00 % State income tax, net of federal tax benefit (1,577 ) 3.38 (618 ) 2.94 Foreign tax (25 ) 0.05 22 (0.10 ) Other 328 (0.72 ) 253 (1.20 ) Valuation allowance net of deferred tax assets 12,989 (27.83 ) 4,247 (20.21 ) Stock-based compensation (1,267 ) 2.71 11 (0.05 ) Return to provision (581 ) 1.25 (45 ) 0.21 Change of rate — — 566 (2.69 ) Effective income tax rate $ 66 (0.2 )% $ 22 (0.1 )% Deferred income taxes reflect the net tax effects of temporary differences between the carrying amount of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred taxes at December 31, 2019 and 2018 are as follows (in thousands): As of December 31, 2019 2018 Deferred tax assets Net operating loss carryforwards $ 30,285 $ 17,228 Operating lease liability 4,915 — Deferred rent — 3,940 Other 1,522 678 Total deferred tax assets 36,722 21,846 Deferred tax liabilities Depreciation and amortization (3,598 ) (4,193 ) Deferred commissions and bonus (2,652 ) (1,848 ) Operating lease right-of-use asset (1,345 ) — Other (847 ) (514 ) Total deferred tax liabilities (8,442 ) (6,555 ) Less: Valuation allowance (28,280 ) (15,291 ) Net deferred tax asset (liability) $ — $ — Due to the Company’s history of net losses and the difficulty in predicting future results, the Company believes that it cannot rely on projections of future taxable income to realize the deferred tax assets. Accordingly, it has established a full valuation allowance against its net deferred tax assets. Significant management judgment is required in determining the Company’s deferred tax assets and liabilities and valuation allowances for purposes of assessing its ability to realize any future benefit from its net deferred tax assets. The Company intends to maintain this valuation allowance until sufficient positive evidence exists to support the reversal of the valuation allowance. Income tax expense recorded in the future will be reduced to the extent that sufficient positive evidence materializes to support a reversal of, or decrease in, the Company’s valuation allowance. The increase in the valuation allowance for deferred tax assets was approximately $13.0 million for the year ended December 31, 2019 . The Company has total net operating loss carryforwards for federal income tax purposes of approximately $25.9 million as of December 31, 2019 , which begin to expire in 2031. The Company has total net operating loss carryforwards for U.S. state income tax purposes of approximately $4.4 million as of December 31, 2019 , which begin to expire in 2031. The operating loss carryforwards may be limited due to a change in control in the Company’s ownership as defined by the Internal Revenue Code Sections 382. Any future changes in the Company’s ownership may limit the use of such carryforward benefits. The Company’s effective income tax rates for the periods presented differ from the statutory rate of 25% due primarily to the impact of the tax reform and the change in the deferred tax asset valuation allowance. The Company files income tax returns in the U.S. federal jurisdiction and various state jurisdictions. Due to its operating loss carryforwards, the U.S. federal statute of limitations remains open for tax year 2010 and onward and the Company continues to be subject to examination by the Internal Revenue Service for tax years 2010 and later. The resolutions of any examinations are not expected to be material to these financial statements. As of December 31, 2019 and 2018 , there are no penalties or accrued interest recorded in the consolidated financial statements. The calculation of the Company’s tax obligations involves dealing with uncertainties in the application of complex tax laws and regulations. ASC 740, Income Taxes, provides that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, on the basis of the technical merits. The Company has assessed its income tax positions and recorded tax benefits for all years subject to examination, based upon its evaluation of the facts, circumstances and information available at each period end. For those tax positions where the Company has determined there is a greater than 50% likelihood that a tax benefit will be sustained, the Company has recorded the largest amount of tax benefit that may potentially be realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is determined there is less than 50% likelihood that a tax benefit will be sustained, no tax benefit has been recognized. The Company had no uncertain tax positions during the years ended December 31, 2019 and 2018 . The Company recognizes interest and, if applicable, penalties for any uncertain tax positions. Interest and penalties are recorded as a component of income tax expense. In the years ended December 31, 2019 and 2018 , the Company did not have any accrued interest or penalties associated with any unrecognized tax benefits. The Company does not provide for U.S. income taxes on unremitted earnings of foreign subsidiaries. Unremitted earnings of foreign subsidiaries were immaterial at December 31, 2019 .

Revolving Line of Credit

Revolving Line of Credit	12 Months Ended
Revolving Line of Credit	Dec. 31, 2019
Debt Disclosure [Abstract]
Revolving Line of Credit	Revolving Line of Credit On December 1, 2017, the Company entered into a Loan and Security Agreement (the “Agreement”) with a financial institution, which was amended on February 26, 2018, July 26, 2018, January 31, 2019, November 26, 2019 and February 5, 2020. The Agreement includes a revolving line of credit facility under which the Company may borrow up to $40.0 million as of December 31, 2019 . The revolving line of credit facility has a maturity date of January 31, 2021, extendable to January 31, 2022 following the completion of the IPO. Borrowings under the Agreement are collateralized by substantially all assets of the Company. There was no outstanding balance under the Agreement as of December 31, 2019 and 2018 . The Agreement contains customary affirmative and negative covenants. The November 2019 amendment includes a “streamline period”, or Streamline Period, concept, which occurs when the Company maintains, for every consecutive day in the immediately preceding fiscal quarter, the sum of (i) unrestricted cash plus (ii) unused availability under the revolving line of credit in an amount equal to or greater than $75.0 million (the “Streamline Balance”). Any Streamline Period terminates on the earlier of the occurrence of an event of default and failure to maintain the Streamline Balance. Interest on borrowings accrues at an interest rate equal to the greater of (i) 4.75% and (ii) (x) at any time when the Streamline Period is not in effect, one and one-half of one percent ( 1.50% ) above the prime rate and (y) at any time when the Streamline Period is in effect, the prime rate. The Company is contingently liable under two standby letters of credit which are required as security for the Company’s current office leases (Note 5). The agreements allow for the Company to elect to secure the letters of credit with restricted cash or by reducing the revolving credit facility borrowing capacity. At December 31, 2019 and 2018 , the Company elected to reduce the revolving credit facility borrowing capacity by $3.2 million as security for future lease payments. On January 22, 2020, the Company entered into a third standby letter of credit for the Company’s office leases and further reduced the revolving credit facility borrowing capacity by $0.8 million .

Convertible Preferred Stock and

Convertible Preferred Stock and Stockholders’ Equity	12 Months Ended
Convertible Preferred Stock and Stockholders’ Equity	Dec. 31, 2019
Equity [Abstract]
Convertible Preferred Stock and Stockholders’ Equity	Convertible Preferred Stock and Stockholders’ Equity Common Stock As of December 31, 2019 , the Company has authorized 1,000,000,000 shares of Class A common stock with a par value of $0.0001 per share and 25,000,000 shares of Class B common stock with a par value of $0.0001 per share. Each holder of Class A and Class B common stock shall be entitled to one and ten votes, respectively, for each share held as of the record date and shall be entitled to receive dividends, when, as and if declared by the Board of Directors. Each share of Class B common stock is convertible into one share of Class A common stock at any time and will convert automatically upon certain transfers and upon the earlier of (i) the first date on which the voting power of all then outstanding shares of Class B common stock represents less than 10% of the combined voting power of all then outstanding shares of Class A common stock and Class B common stock, (ii) the date that is seven ( 7 ) years from the closing of the IPO on December 17, 2019 and (iii) the date specified by a vote of the holders of a majority of the then outstanding shares of Class B common stock, voting as a separate class. Following such conversion, each share of Class A common stock will have one vote per share and the rights of the holders of all outstanding shares of common stock will be identical. The total Class A and Class B common stock outstanding as of December 31, 2019 is 39,041,065 and 9,803,933 shares, respectively. Convertible Preferred Stock As of December 31, 2018 , the Company had the following preferred stock outstanding (in thousands, except share and per share data): As of December 31, 2018 Series Issue Date Shares Authorized Shares Issued and Outstanding Carrying Amount Aggregate Liquidation Preference Issuance Price Per Share Series A convertible preferred stock (“Series A”) April and June 2010 2,690,403 2,690,403 $ 448 $ 448 $ 0.1667 Series A-1 convertible preferred stock (“Series A-1”) October 2010 1,600,000 1,600,000 800 800 0.5000 Series B convertible preferred stock (“Series B”) February 2011 6,108,000 6,108,000 9,961 9,999 1.6370 Series B-1 convertible preferred stock (“Series B-1”) June 2014 2,492,570 2,449,700 9,663 9,714 3.9655 Series C convertible preferred stock (“Series C”) February 2016 6,989,863 6,989,863 41,799 42,000 6.0087 Series D convertible preferred stock (“Series D”) December 2018 2,176,297 2,176,297 40,305 40,500 18.6096 Total all series 22,057,133 22,014,263 $ 102,976 $ 103,461 Immediately prior to the closing of the IPO on December 17, 2019, all shares of outstanding convertible preferred stock automatically converted into an aggregate of 22,014,263 shares of Class A common stock. There was no

Incentive Stock Plan

Incentive Stock Plan	6 Months Ended	12 Months Ended
Incentive Stock Plan	Jun. 30, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Incentive Stock Plan	Incentive Stock Plan Stock-based compensation expense is included in the unaudited condensed consolidated statements of operations and comprehensive loss as follows: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 (in thousands) Cost of revenue $ 169 $ — $ 464 $ — Research and development 450 — 934 — Sales and marketing 697 — 1,166 — General and administrative 1,165 5,298 3,439 5,298 Total stock-based compensation $ 2,481 $ 5,298 $ 6,003 $ 5,298	Incentive Stock Plan On April 27, 2016, the Company established the Sprout Social, Inc. 2016 Stock Plan (the “2016 Plan”) as an amendment and restatement of the Sprout Social, Inc. 2010 Amended and Restated Stock Incentive Plan, under which awards, including options, restricted stock purchases rights, restricted stock bonus or restricted stock unit awards, for up to 5,467,862 shares of common stock may, at the discretion of the Board of Directors, be issued to employees, consultants, and directors of the Company. Under the 2016 Plan, any shares withheld upon settlement of RSUs, as elected by the employee to cover withholding taxes, will again be available for future grants under the plan. There were no changes to existing stock options outstanding as a result of the amendment and restatement. The exercise price for each award is determined by the Board of Directors. However, each option must have an exercise price of at least the fair market value of the option and no less than 110% of fair market value for options granted to a 10% owner optionee. Effective October 17, 2019, the Company established the Sprout Social, Inc. 2019 Incentive Award Plan (the “2019 Plan”), under which awards, including options, stock appreciation rights, restricted stock awards, restricted stock unit awards, other stock or cash based awards and dividend equivalent awards, for up to 5,293,497 shares of Class A common stock may, at the discretion of the Board of Directors, be issued to employees, consultants, and directors of the Company. Effective December 12, 2019, the Company established the Sprout Social, Inc. 2019 Class B Incentive Award Plan (the “Class B Plan”), under which cash and equity incentive awards, for up to 550,000 shares of Class B common stock may, at the discretion of the Board of Directors, be issued to employees, consultants, and directors of the Company, with the expectation that shares will only be issued to the Company’s CEO depending on the valuation of the Company in connection with the IPO and the achievement of market capitalization thresholds thereafter. The only awards granted as of December 31, 2019 are stock options, restricted stock units and restricted stock awards. Stock Options The options become fully vested at such time or times, or upon such event or events, and subject to such terms, conditions, performance criteria, and restrictions as shall be determined by the Board of Directors and set forth in each stock option notice; provided, however, that no exercise period shall exceed ten years from the grant date. The fair value of each option is estimated on the date of grant based on the Black-Scholes option pricing model. The annual rate of dividends is expressed as a dividend yield which is a constant percentage of the stock price, which is determined by the board of directors with input from a third-party valuation specialist. The expected life of an option represents the period of time that an option is expected to be outstanding. The risk‐free interest rate is based on the rate of U.S. Treasury securities with maturities consistent with the estimated expected term of the awards. The Company has not paid dividends and does not anticipate paying a cash dividend on common stock in the foreseeable future and, accordingly, uses an expected dividend yield of zero . As the Company was privately held during the life of the options, there is no historical basis of the stock volatility. Accordingly, the expected volatility is based primarily on the historical volatilities of similar entities’ common stock over the most recent period commensurate with the estimated expected term of the awards. The expected term of an award is determined using the simplified method for plain vanilla options, consistent with applicable accounting guidance. Total compensation expense included in the statement of operations for options was $0.1 million and $0.5 million for 2018 and 2017, respectively. There was no compensation expense included in the statement of operations for options in 2019. The table below summarizes the stock option activity for the year ended December 31, 2019 : Number of Options Weighted Average Exercise Price Weighted Average Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Outstanding at beginning of period 1,328,696 $ 0.54 3.67 $ 8,529 Granted at fair value — — Exercised (163,962 ) 0.56 Forfeited (5,157 ) 1.08 Outstanding at end of period 1,159,577 $ 0.54 2.67 $ 17,990 Options exercisable at December 31, 2019 1,159,577 $ 0.54 2.67 $ 17,990 The Company has computed the aggregate intrinsic value of amounts disclosed in the above table based on the difference between the original exercise price of the options and the estimated fair value of the Company’s common stock as of December 31, 2019 . The intrinsic value of options exercised for the years ended December 31, 2019 , 2018 and 2017 was $2.5 million , $1.1 million and $0.8 million , respectively. At the end of 2015, the Company ceased issuing stock options. The following summarizes information about the Company’s options outstanding as of December 31, 2019 : Options Outstanding Options Exercisable Exercise Price Shares Weighted- Average Remaining Contractual Term Shares Weighted- (in years) (in years) $0.31 - $0.69 952,867 2.1 952,867 2.1 $0.70 - $1.07 35,000 4.5 35,000 4.5 $1.08 - $1.10 101,405 5.1 101,405 5.1 $1.11 - $3.97 70,305 5.3 70,305 5.3 1,159,577 1,159,577 Restricted Stock Units At the end of 2015, the Company began issuing restricted stock units. The general terms of the restricted stock units issued under the 2016 Plan require both a service and performance condition to be satisfied prior to vesting. The service condition is satisfied upon the participant’s completion of a required period of continuous service from the vesting start date. The performance condition was satisfied upon the completion of the IPO. The general terms of the restricted stock units issued under the 2019 Plan require only a service condition to be satisfied prior to vesting. The restricted stock units issued under the Class B Plan require both a performance condition and a market condition to be satisfied prior to vesting. The performance condition was satisfied upon the completion of the IPO. The grant-date fair value of RSUs that contain a market condition is determined using a Monte Carlo valuation model in order to simulate a range of possible future stock prices. Key assumptions used include a risk‐free interest rate of 1.61% and expected volatility of 62.5% . The table below summarizes the activity regarding unvested restricted stock units for the year ended December 31, 2019 : Restricted Stock Units Weighted Average Grant Date Fair Value Unvested at December 31, 2018 2,477,569 $ 6.19 Granted 1,742,551 13.32 Vested (2,024,786 ) 7.52 Forfeited (183,986 ) 6.67 Unvested at December 31, 2019 2,011,348 $ 11.02 The weighted-average grant date fair value per share for restricted stock units granted during the years ended December 31, 2019 , 2018 and 2017 was $13.32 , $6.91 and $6.15 , respectively. The total unrecognized stock-based compensation expense relating to these awards as of December 31, 2019 was $17.4 million , which is expected to be recognized over a weighted-average period of 3 years . Restricted Stock Awards In June 2019, the Company recognized $5.3 million of stock-based compensation expense related to a restricted stock award (RSA) grant of 434,436 shares to its Chief Executive Officer, which vested in full on the grant date. In accordance with the RSA grant agreement, the award was net settled to satisfy the federal and state tax withholding obligations, resulting in the issuance of 242,155 shares of common stock. The net settlement was treated as a repurchase of treasury shares. All of the expense was recognized in general and administrative on the consolidated statement of operations and comprehensive loss. Stock-based Compensation Expense Stock-based compensation expense is included in the consolidated statement of operations and comprehensive loss as follows (in thousands): Years Ended December 31, 2019 2018 2017 Cost of revenue $ 1,126 $ 9 $ 20 Research and development 2,290 28 161 Sales and marketing 8,697 15 259 General and administrative 13,220 1 33 Total stock-based compensation expense $ 25,333 $ 53 $ 473

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended	12 Months Ended
Commitments and Contingencies	Jun. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Contractual Obligations The Company has non-cancellable minimum guaranteed purchase commitments for data and services. Contractual commitments as of June 30, 2020 are as follows (in thousands): Years ending December 31, 2020 $ 6,786 2021 20,486 2022 27,495 2023 15,222 2024 — Thereafter — Total contract commitments $ 69,989 Legal Matters From time to time in the normal course of business, the Company may be subject to various legal matters such as threatened or pending claims or proceedings. There were no material such matters as of and for the period ended June 30, 2020 . Indemnification In the ordinary course of business, the Company often includes standard indemnification provisions in its arrangements with third parties, including vendors, customers, investors and the Company’s directors and officers. Pursuant to these provisions, the Company may be obligated to indemnify such parties for losses or claims suffered or incurred. It is not possible to determine the maximum potential loss under these indemnification provisions due to the Company’s limited history of prior indemnification claims and the unique facts and circumstances involved in each particular provision. There were no material obligations under such indemnification agreements as of and for the period ended June 30, 2020 .	Commitments and Contingencies Contractual Obligations The Company has non-cancellable minimum guaranteed purchase commitments for data and services. Contractual commitments as of December 31, 2019 are as follows (in thousands): Years ending December 31, 2020 $ 13,572 2021 20,486 2022 27,495 2023 15,222 2024 — Thereafter — Total contractual obligations $ 76,775 Legal Matters From time to time in the normal course of business, the Company may be subject to various legal matters such as threatened or pending claims or proceedings. There were no material such matters as of and for the year ended December 31, 2019 . Indemnification In the ordinary course of business, the Company often includes standard indemnification provisions in its arrangements with third parties, including vendors, customers, investors and the Company’s directors and officers. Pursuant to these provisions, the Company may be obligated to indemnify such parties for losses or claims suffered or incurred. It is not possible to determine the maximum potential loss under these indemnification provisions due to the Company’s limited history of prior indemnification claims and the unique facts and circumstances involved in each particular provision. There were no material obligations under such indemnification agreements as of and for the year ended December 31, 2019 .

Segment and Geographic Data

Segment and Geographic Data	6 Months Ended	12 Months Ended
Segment and Geographic Data	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Segment and Geographic Data	Segment and Geographic Data The Company operates as one operating segment. The Company’s chief operating decision maker (“CODM”) is its chief executive officer, who reviews financial information for purposes of making operating decisions, assessing financial performance and allocating resources. The Company’s CODM evaluates financial information on a consolidated basis. As the Company operates as one operating segment, all required segment financial information is found in the condensed consolidated financial statements. Long-lived assets by geographical region are based on the location of the legal entity that owns the assets. As of June 30, 2020 and December 31, 2019 , there were no significant long-lived assets held by entities outside of the United States. Revenue by geographical region is determined by location of the Company’s customers. Revenue from customers outside of the United States was approximately 28% for each of the six months ended June 30, 2020 and 2019 , respectively. Revenue by geographical region is as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Americas $ 24,592 $ 19,542 $ 48,392 $ 37,781 EMEA 5,048 3,882 10,059 7,615 Asia Pacific 1,762 1,339 3,486 2,746 Total $ 31,402 $ 24,763 $ 61,937 $ 48,142	Geographic Data As described in the Summary of Significant Accounting Policies, the Company operates as one operating segment. Long-lived assets by geographical region are based on the location of the legal entity that owns the assets. As of December 31, 2019 and 2018 , there were no significant long-lived assets held by entities outside of the United States. Revenue by geographical region is determined by location of the Company’s customers. Revenue from customers outside of the United States was approximately 29% , 30% and 32% for the year ended December 31, 2019 , 2018 and 2017 , respectively. Revenue by geographical region is as follows (in thousands): Year Ended December 31, 2019 2018 2017 Americas $ 80,574 $ 61,501 $ 33,853 EMEA 16,220 12,674 7,914 Asia Pacific 5,913 4,638 3,048 Total $ 102,707 $ 78,813 $ 44,815

Net Loss per Share

Net Loss per Share	6 Months Ended	12 Months Ended
Net Loss per Share	Jun. 30, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net Loss per Share	Net Loss per Share Basic net loss per share is calculated by dividing the net loss by the weighted average number of outstanding shares of common stock each period. Diluted net loss per share is calculated by giving effect to all potential dilutive common stock equivalents, which includes stock options, restricted stock units, restricted stock awards, preferred stock and warrants. Because the Company incurred net losses each period, the basic and diluted calculations are the same. Basic and diluted net loss per share are the same for each class of common stock, as both Class A and Class B stockholders are entitled to the same liquidation and dividend rights. The following table presents the calculation for basic and diluted net loss per share (in thousands, except share and per share data): Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Net loss attributable to common shareholders $ (8,302 ) $ (10,755 ) $ (18,782 ) $ (15,918 ) Weighted average common shares outstanding 50,527,432 16,753,014 50,263,061 16,832,105 Net loss per share, basic and diluted $ (0.16 ) $ (0.64 ) $ (0.37 ) $ (0.95 ) The following outstanding shares of common stock equivalents were excluded from the calculation of diluted net loss per share for each period, as the impact of including them would have been anti-dilutive. The Company’s RSUs included a triggering liquidation performance condition prior to vesting. As such, these are treated as contingently issuable shares and were excluded from potential dilutive impact until the triggering liquidation performance condition was satisfied upon completion of the IPO on December 17, 2019. June 30, 2020 2019 Stock options outstanding 416,081 1,275,473 RSUs 2,155,006 — Convertible preferred stock — 22,014,263 Warrants — 35,305 Total potentially dilutive shares 2,571,087 23,325,041	Net Loss per Share Basic net loss per share is calculated by dividing the net loss by the weighted average number of outstanding shares of common stock each period. Diluted net loss per share is calculated by giving effect to all potential dilutive common stock equivalents, which includes stock options, RSUs, preferred stock and warrants. Because the Company incurred net losses each period, the basic and diluted calculations are the same. Basic and diluted net loss per share are the same for each class of common stock, as both Class A and Class B stockholders are entitled to the same liquidation and dividend rights. The following table presents the calculation for basic and diluted net loss per share (in thousands, except share and per share data): Year Ended December 31, 2019 2018 2017 Net loss attributable to common shareholders $ (46,807 ) $ (20,934 ) $ (21,910 ) Weighted average common shares outstanding 18,438,695 16,593,258 16,400,767 Net loss per share, basic and diluted $ (2.54 ) $ (1.26 ) $ (1.34 ) The following outstanding shares of common stock equivalents were excluded from the calculation of diluted net loss per share for each period, as the impact of including them would have been anti-dilutive. The Company’s RSUs included a triggering liquidation performance condition prior to vesting. As such, these were treated as contingently issuable shares and were excluded from potential dilutive impact until the triggering liquidation performance condition was satisfied upon completion of the IPO on December 17, 2019. As of December 31, 2019 2018 2017 Stock options outstanding 1,159,577 1,313,121 1,523,328 RSUs outstanding 2,364,650 — Convertible preferred stock — 19,945,290 19,837,966 Warrants 35,305 35,305 35,305 Total potentially dilutive shares 3,559,532 21,293,716 21,396,599

Employee Benefit Plan

Employee Benefit Plan	12 Months Ended
Employee Benefit Plan	Dec. 31, 2019
Postemployment Benefits [Abstract]
Employee Benefit Plan	Employee Benefit Plan The Company sponsors a qualified 401(k) defined contribution plan for the benefit of its employees. The Company made matching contributions to the plan totaling $1.3 million , $1.0 million and $0.6 million for the years ended December 31, 2019 , 2018 and 2017 , respectively.

Related Party Transactions

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions An employee of an affiliate of Goldman Sachs & Co. LLC, a member of the underwriting syndicate of the Company’s IPO, serves on the Company’s board of directors pursuant to the Sixth Amended and Restated Voting Agreement, which provides that holders of a majority of the Company’s common stock issued or issuable upon conversion of its Series C preferred stock have the right to appoint one member to the Company’s board of directors. Prior to the IPO, entities affiliated with Goldman Sachs & Co. LLC owned a majority of the Company’s Series C preferred stock, and these entities continue to hold a majority of the common stock issued upon conversion of the Company’s Series C preferred stock at the closing of the IPO. Upon closing of the IPO on December 17, 2019, the Company paid $4.2 million to Goldman Sachs & Co. LLC for underwriting discounts and commissions.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
Fair Value Measurements	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company measures certain financial assets at fair value. Fair value is determined based upon the exit price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants, as determined by either the principal market or the most advantageous market. Inputs used in the valuation techniques to derive fair values are classified based on a three-level hierarchy, as follows: • Level 1: Quoted prices in active markets for identical assets or liabilities. • Level 2: Observable inputs, other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3: Unobservable inputs that are supported by little or no market activity. The following tables present information about the Company’s financial assets that are measured at fair value and indicate the fair value hierarchy of the valuation inputs used (in thousands): June 30, 2020 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 75,147 $ — $ — $ 75,147 Marketable Securities: Corporate bonds — 23,061 — 23,061 Commercial paper — 16,444 — 16,444 U.S. Treasury securities — 10,166 — 10,166 Total assets $ 75,147 $ 49,671 $ — $ 124,818 December 31, 2019 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 129,280 $ — $ — $ 129,280 Total assets $ 129,280 $ — $ — $ 129,280 The Company classifies its money market funds within Level 1 of the fair value hierarchy because they are valued based on quoted prices on active markets. Marketable securities are classified within Level 2 because they are valued using inputs other than quoted prices that are directly or indirectly observable in the market. The carrying amounts of certain financial instruments, including cash held in banks, accounts receivable, accounts payable and accrued liabilities, approximate fair value due to their short-term maturities and are excluded from the fair value tables above. As of June 30, 2020, the Company held investment-grade marketable securities that had maturities within one year and were accounted for as available-for-sale securities. There was not a significant difference between the amortized cost and fair value of these securities.

Subsequent Events

Subsequent Events	6 Months Ended	12 Months Ended
Subsequent Events	Jun. 30, 2020	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The Company has evaluated subsequent events after the balance sheet date through August 6, 2020, the date the financial statements were issued. Management has determined that no events or transactions have occurred subsequent to the balance sheet date that require disclosure in the financial statements.	Subsequent Events On January 15, 2020, the underwriters of the Company’s IPO exercised their option to purchase additional shares of the Company’s Class A common stock to cover sales by the underwriters of a greater number of shares than the total set forth in the filed prospectus for the IPO. The underwriters purchased an additional 629,603 shares of Class A common stock from the Company. The gross proceeds to the Company of the issuance were $10.7 million , and the Company received net proceeds of $10.0 million after deducting underwriting discounts and commissions.

Nature of Operations and Summ_2

Nature of Operations and Summary of Significant Accounting Policies (Policies)	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of Consolidation	All significant intercompany transactions and balances have been eliminated in consolidation.	All significant intercompany transactions and balances have been eliminated in consolidation.
Basis of Presentation	The unaudited condensed consolidated financial statements and accompanying notes were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and the applicable regulations of the United States Securities and Exchange Commission (“SEC”) regarding interim financial reporting. The Company has prepared the unaudited condensed consolidated financial statements on a basis substantially consistent with the audited consolidated financial statements of the Company as of and for the year ended December 31, 2019 , and these unaudited condensed consolidated financial statements include all normal recurring adjustments necessary for a fair statement of the results of the interim periods presented but are not necessarily indicative of the results of operations to be anticipated for the full year or any future period. The consolidated balance sheet as of December 31, 2019	The consolidated financial statements and accompanying notes were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”).
Use of Estimates	The preparation of financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The Company bases its estimates on historical experience and on other assumptions that its management believes are reasonable under the circumstances, including but not limited to the potential impacts arising from the COVID-19 pandemic. As the extent and duration of the impact of the COVID-19 pandemic remains uncertain, the Company’s estimates and judgments may evolve as conditions change. The Company is not aware of any events or circumstances that would require an update to its estimates and judgments or a revision of the carrying value of its assets or liabilities as of August 6, 2020, the date of issuance of these financial statements. Actual results could differ from those estimates. The Company’s most significant estimates and judgments are those related to the estimated period of benefit for incremental costs of obtaining a contract with a customer, the incremental borrowing rate for operating leases, calculation of allowance for doubtful accounts, useful lives of long-lived assets, stock-based compensation, income taxes, commitments and contingencies and litigation, among others.	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The Company bases its estimates on historical experience and on other assumptions that its management believes are reasonable under the circumstances. Actual results could differ from those estimates. The Company’s most significant estimates and judgments are those related to the estimated period of benefit for incremental costs of obtaining a contract with a customer, the incremental borrowing rate for operating leases, calculation of allowance for doubtful accounts, valuation of assets and liabilities acquired as part of business combinations, useful lives of long-lived assets, stock-based compensation, income taxes, commitments and contingencies and litigation, among others.
Segment Information		Segment Information The Company operates as one operating segment. The Company’s chief operating decision maker (“CODM”) is its chief executive officer, who reviews financial information for purposes of making operating decisions, assessing financial performance and allocating resources. The Company’s CODM evaluates financial information on a consolidated basis. As the Company operates as one operating segment, all required segment financial information is found in the consolidated financial statements.
Fair Value of Financial Instruments		Fair Value of Financial Instruments The Company has the following financial instruments: cash, cash equivalents, accounts receivable, accounts payable and accrued liabilities. The carrying value of the Company’s cash equivalents, accounts receivable, accounts payable and accrued liabilities approximates fair value due to their short-term nature.
Cash and Cash Equivalents		Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents. Cash and cash equivalents are recorded at cost, which approximates fair value. Interest earned on cash and cash equivalents is recorded as interest income in the consolidated statement of operations.
Accounts Receivable		Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable primarily consist of amounts billed and currently due from customers, net of an allowance for doubtful accounts. Subscription fees billed in advance of the related subscription term represent contract liabilities and are presented as accounts receivable and deferred revenues upon establishment of an unconditional right to payment under non-cancellable contracts. Our typical payment terms provide for customer payment within 30 days of the date of the contract.
Allowance for Doubtful Accounts		Accounts receivable are subject to collection risk. The Company performs evaluations of its customers’ financial positions and generally extends credit on account, without collateral. The Company determines the need for an allowance for doubtful accounts based upon various factors, including past collection experience, credit quality of the customer, age of the receivable balance and current economic conditions.
Concentration of Credit Risk		Concentration of Credit Risk Financial instruments that potentially expose the Company to concentrations of credit risk are primarily cash and accounts receivable. The Company maintains cash balances that may exceed the insured limits by the Federal Deposit Insurance Corporation. The Company has not experienced any losses on its deposits of cash.
Property and Equipment		Property and Equipment Property and equipment are recorded at cost, net of accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the following estimated useful lives: Computer equipment and hardware 3-5 years Furniture and fixtures 3-7 years Leasehold improvements Lesser of useful life or remaining lease term Maintenance and repairs that do not improve or extend the lives of the respective assets are expensed as incurred. Upon retirement or sale, the cost of assets disposed and the related accumulated depreciation are written off, and any resulting gain or loss is credited or charged to income.
Goodwill		Goodwill Goodwill consists of the excess purchase price over the fair value of net assets acquired in purchase business combinations. The Company conducts a test for the impairment of goodwill on at least an annual basis as of October 1 st or sooner if indicators of impairment arise. The Company first assesses qualitative factors to determine whether it is more likely than not that goodwill is impaired. As part of the qualitative assessment, the Company evaluates factors including macroeconomic conditions, industry and market considerations, cost factors and overall financial performance of its reporting unit.
Impairment of Long-Lived Assets		Impairment of Long-Lived Assets
Revenue Recognition	Deferred Revenue Deferred revenue is recorded upon establishment of unconditional right to payment under non-cancelable contracts and is recognized as the revenue recognition criteria are met. The Company generally invoices customers in advance in monthly, quarterly, semi-annual and	Revenue Recognition The Company generates revenues from subscriptions to the Company’s web-based social media management platform under a software-as-a-service model. Our subscriptions can range from monthly to one-year or multi-year arrangements and are generally non-cancellable. The Company’s customers do not have the right to take possession of the online software solution. The Company commences revenue recognition when control of these products is transferred to customers in an amount that reflects the consideration the Company expects to be entitled to in exchange for such products. The Company determines revenue recognition through the following steps: • identify the contract with a customer; • identify the performance obligations in a contract; • determination of the transaction price; • allocate the transaction price to the performance obligations identified in the contract; and • recognize revenue when (or as) performance obligations are satisfied. Identify the contract with a customer A customer contract is generally identified when the Company and a customer have executed an agreement or online acceptance that requires the Company to grant access to its online software products and provide professional services in exchange for consideration from the customer. Identify the performance obligations in a contract A performance obligation is a promise to provide a distinct service or a series of distinct services. A service that is promised to a customer is distinct if the customer can benefit from the service either on its own or together with other readily available resources, and a company’s promise to transfer the service to the customer is separately identifiable from other promises in the contract. The Company has determined that subscriptions for its online software products are a distinct performance obligation, because no implementation work is required and the online software product is fully functional once a customer has access. In addition, the Company sells professional services consisting of, but not limited to, implementation fees, specialized training, one-time reporting services and recurring periodic reporting services. Professional services are distinct, as they are sold separately, and the customer can benefit from the services to make better use of the online product purchased. Determination of the transaction price The transaction price is the amount of consideration to which the Company expects to be entitled in exchange for transferring goods or services to a customer. The Company estimates any variable consideration it will be entitled at contract inception and will reassess as circumstances change, when determining the transaction price. The transaction price for subscription and professional services is generally fixed at contract inception; therefore, the Company’s contracts do not contain a significant amount of variable consideration. As a result, the amount of revenue recognized in the periods presented from performance obligations satisfied (or partially satisfied) in previous periods due to changes in the transaction price was not material. Allocate the transaction price to the performance obligations identified in the contract If the contract contains a single performance obligation, the Company allocates the entire transaction price to the single performance obligation. For contracts containing multiple performance obligations, the transaction price is allocated to each performance obligation based on the relative standalone selling price (“SSP”) of the services provided to the customer. The Company determines the SSP based upon the prices at which the Company separately sells subscription and various professional services, and based on the Company’s overall pricing objectives, taking into consideration market conditions, value of the Company’s contracts, the types of offerings sold, customer demographics and other factors. Recognize revenue when (or as) performance obligations are satisfied Subscription revenues are recognized ratably over the contract terms beginning on the date the Company’s service is made available to customers, which typically begins on the commencement date of each contract as no implementation work is required. The Company’s customers do not have the right to take possession of the online software solution. The Company’s subscription service arrangements are generally non-cancellable and do not provide for refund of subscription fees. Professional services are typically provided for a fixed fee, and revenues are recognized over time for these contracts as services are provided to the customer. Professional services revenue represents less than 1% of revenue for the periods presented.
Sales Commissions		Sales Commissions
Cost of Revenues		Cost of Revenues Cost of revenues primarily consist of expenses related to hosting the Company’s service and providing support to customers, depreciation associated with computers and hardware and amortization expense related to acquired developed technologies. These expenses are comprised of hosted data center global costs, fees paid to third-party data providers and personnel-related costs directly associated with cloud infrastructure and customer support, including salaries, benefits, bonuses and allocated overhead. Overhead associated with facilities and information technology is allocated to cost of revenue and operating expenses based on headcount.
Advertising Costs		Advertising Costs
Research and Development Costs		Research and Development Costs Costs incurred in research and development are expensed as incurred and consist primarily of payroll, employee benefits, allocated overhead and other expenses associated with product development.
Share-Based Compensation		Stock-Based Compensation The Company recognizes compensation expense for equity awards based on the grant‐date fair value over the remaining requisite service period for the award. For awards subject to graded vesting, the compensation expense recognized is at least equal to the vested portion of the award. The Company uses the Black‐Scholes option pricing model to measure the fair value of the option awards. The Company sets the exercise price at the estimated fair‐market value at the date of the grant. Management utilized third‐party valuations to assist with the determination of the Company’s estimated fair‐market value and common stock price prior to completion of its IPO on December 17, 2019. The exercise price affects the fair value of the option award in the Black‐Scholes option pricing model. The grant-date fair value of RSUs that contain a market condition is determined using a Monte Carlo valuation model. The Company recognizes forfeitures as they occur.
Leases		Leases The Company determines if an arrangement is a lease at inception, and all significant lease arrangements are generally recognized at lease commencement. Operating lease right-of-use, or ROU, assets and operating lease liabilities are recognized at commencement based on the present value of fixed payments not yet paid over the remaining lease term. ROU assets also include any initial indirect costs incurred and any lease payments made at or before the lease commencement date, less lease incentives received. For short-term leases of 12 months or less, no ROU asset or lease liability is recorded. The Company records rent expense in its condensed consolidated statement of operations and comprehensive loss on a straight-line basis over the term of the lease and records variable lease payments as incurred. Additionally, the Company has elected to combine lease and non-lease components and account for them as a single component. ROU assets represent the Company’s right to use an underlying asset during the lease term, and lease liabilities represent its obligations to make lease payments arising from the lease. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that it will exercise the option. The Company uses its incremental borrowing rate in determining the lease liabilities, as its leases generally do not provide an implicit rate. The incremental borrowing rate is an estimate of the collateralized borrowing rate the Company would incur on future lease payments over a similar term based on the information available at the commencement date. The Company does not have any finance leases.
Commitments and Contingencies		Commitments and Contingencies The Company evaluates all pending or threatened commitments and contingencies, if any, that are reasonably likely to have a material effect on its operations or financial position. The Company assesses the probability of an adverse outcome and records a provision for a liability when management believes that it is probable that a liability has been incurred and the amount can be reasonably estimated.
Income Taxes		Income Taxes The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. The Company recognizes deferred tax assets to the extent that these assets are believed to be more likely than not to be realized. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts that are more likely than not expected to be realized. In making such a determination, all available positive and negative evidence is considered, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies and results of recent operations. Tax benefits for uncertain tax positions are based upon management’s evaluation of the information available at the reporting date. To be recognized in the financial statements, a tax benefit must be at least more-likely-than-not of being sustained based on technical merits. The benefit for positions meeting the recognition threshold is measured as the largest benefit more-likely-than-not of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The Company’s policy is to recognize interest and penalties related to the underpayment of income taxes as a component of provision for income taxes. Accrued interest and penalties are included on the related tax liability line in the consolidated balance sheets, as applicable. The Company files income tax returns in the U.S. federal jurisdiction, Illinois and other state jurisdictions. It is difficult to predict the final timing and resolution of any particular uncertain tax position. Based on the Company’s assessment of many factors, including past experience and complex judgments about future events, the Company does not currently anticipate significant changes in its uncertain tax positions over the next 12 months.
Deferred Offering Costs		Deferred Offering Costs Deferred offering costs of $5.8 million , primarily consisting of certain legal, accounting and other third-party fees that were directly associated with the IPO, were recorded in stockholders’ equity as a reduction of additional paid-in capital generated upon closing of the IPO on December 17, 2019.
Net Loss per Share		Net Loss per Share The Company calculates basic net loss per share by dividing net loss attributable to common shareholders by the weighted-average number of the Company’s common stock shares outstanding during the respective period. Net loss attributable to common shareholders is net loss minus convertible preferred stock dividends declared, of which there were none during the periods presented. The Company calculates diluted net loss per share using the treasury stock and if-converted methods, which consider the potential impacts of outstanding stock options, RSUs, warrants and convertible preferred stock. Under these methods, the numerator and denominator of the net loss per share calculation are adjusted for these securities if the impact of doing so increases net loss per share. During the periods presented, the impact is to decrease net loss per share and therefore the Company is precluded from adjusting its calculation for these securities. As a result, diluted net loss per share is calculating using the same formula as basic net loss per share.
Marketable Securities	Marketable Securities Marketable securities consist of corporate bonds, commercial paper, and U.S. Treasury securities. The Company classifies marketable securities as available-for-sale at the time of purchase and reevaluates such classification as of each balance sheet date. All marketable securities are recorded at their estimated fair values. Unrealized gains and losses for the available-for-sale debt securities that are unrelated to credit loss factors are recorded in accumulated other comprehensive income (loss), or AOCI. As of June 30, 2020 and December 31, 2019, the Company’s AOCI bal
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, including subsequent amendments, Measurement of Credit Losses on Financial Instruments (Topic 326) (“ASU 2016-13”), which modifies the accounting methodology for most financial instruments by establishing a new “expected loss model” that requires entities to estimate current expected credit losses on financial instruments, including trade accounts receivable, by using all practical and relevant information. This guidance is effective for interim and annual periods beginning after December 15, 2019. The Company adopted the ASU as of January 1, 2020, and the adoption did not have a material impact on the Company’s condensed consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other-Internal-Use Software (“ASU 2018-15”), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The guidance is effective for interim and annual reporting periods beginning after December 15, 2019. The Company adopted the ASU as of January 1, 2020, and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.	Recently Adopted Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases (“ASU 2016 02”), including subsequent amendments. ASU 2016-02 requires lessees to record a ROU asset and lease liability for almost all leases. This ASU does not substantially impact lessor accounting. The Company adopted the standard on January 1, 2019 using a modified retrospective approach of applying the new standard at the adoption date. Under this approach, the Company will continue to report comparative periods presented in the period of adoption under ASC 840. The Company has elected the package of practical expedients permitted under the transition guidance within the new standard, which does not require it to reassess 1) whether any expired or existing contracts contain leases, 2) the lease classification of any expired or existing leases or 3) any initial direct costs for any existing leases. Adoption of this standard resulted in recognition of ROU assets of $6.7 million , short-term lease liabilities of $1.8 million , long-term lease liabilities of $20.3 million , a decrease in accrued expenses and other of $0.7 million and a decrease in deferred rent, net of current portion of $14.7 million , with no impact on retained earnings as of January 1, 2019. The adoption of the standard is not expected to have a significant impact on the Company’s condensed consolidated statement of operations. See Note 5 for further details.

Nature of Operations and Summ_3

Nature of Operations and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Activity related to the allowance for doubtful accounts	The activity related to the allowance for doubtful accounts for the year ended December 31, 2019 was as follows (in thousands): Balance at December 31, 2018 $ 374 Additions 1,920 Write-offs, net of recoveries (1,588 ) Balance at December 31, 2019 $ 706
Schedule of property and equipment	Depreciation is computed using the straight-line method over the following estimated useful lives: Computer equipment and hardware 3-5 years Furniture and fixtures 3-7 years Leasehold improvements Lesser of useful life or remaining lease term As of the dates specified below, property and equipment consisted of the following (in thousands): As of December 31, 2019 2018 Leasehold improvements $ 15,075 $ 15,045 Furniture and fixtures 3,630 3,498 Computer equipment and hardware 1,926 1,590 Total property and equipment 20,631 20,133 Less: Accumulated depreciation (7,102 ) (4,609 ) Total property and equipment, net $ 13,529 $ 15,524

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
Property and Equipment (Tables)	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Schedule of property and equipment	Depreciation is computed using the straight-line method over the following estimated useful lives: Computer equipment and hardware 3-5 years Furniture and fixtures 3-7 years Leasehold improvements Lesser of useful life or remaining lease term As of the dates specified below, property and equipment consisted of the following (in thousands): As of December 31, 2019 2018 Leasehold improvements $ 15,075 $ 15,045 Furniture and fixtures 3,630 3,498 Computer equipment and hardware 1,926 1,590 Total property and equipment 20,631 20,133 Less: Accumulated depreciation (7,102 ) (4,609 ) Total property and equipment, net $ 13,529 $ 15,524

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
Intangible Assets (Tables)	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of finite-lived intangible assets	Intangible assets are all amortizable and have weighted-average amortization periods as follows: Intangible assets Years Customer relationships 7 Trademark 2 Technology platform 3 Noncompetition agreement 2 As of the dates specified below, intangible assets, net consisted of the following (in thousands): As of December 31, 2019 2018 Customer relationships $ 7,300 $ 7,300 Trademark 120 120 Technology platform 1,150 1,150 Noncompetition agreement 110 110 8,680 8,680 Less: Accumulated amortization Customer relationships (2,169 ) (1,126 ) Trademark (120 ) (65 ) Technology platform (799 ) (415 ) Noncompetition agreement (110 ) (60 ) (3,198 ) (1,666 ) Intangible assets, net $ 5,482 $ 7,014
Finite-lived intangible assets amortization expense	The expected future amortization of intangible assets as of December 31, 2019 is summarized as follows (in thousands): Years Ending December 31, Amortization Expense 2020 $ 1,394 2021 1,043 2022 1,043 2023 1,043 2024 959 $ 5,482

Operating Leases (Tables)

Operating Leases (Tables)	12 Months Ended
Operating Leases (Tables)	Dec. 31, 2019
Leases [Abstract]
Summary of operating lease assets and liabilities	The following table provides a summary of operating lease assets and liabilities as of December 31, 2019 (in thousands): Assets Operating lease right-of-use assets $ 5,618 Liabilities Operating lease liabilities 2,331 Operating lease liabilities, non-current 18,196 Total operating lease liabilities $ 20,527
Schedule of remaining maturities of operating lease liabilities	Remaining maturities of operating lease liabilities as of December 31, 2019 are as follows (in thousands): Years ending December 31, 2020 $ 3,474 2021 2,969 2022 3,033 2023 3,097 2024 3,165 Thereafter 10,108 Total future minimum lease payments $ 25,846 Less: imputed interest $ (5,319 ) Total operating lease liabilities $ 20,527
Schedule of future minimum lease payments	Future minimum lease payments under ASC 840 for non-cancellable operating leases as of December 31, 2018 was as follows (in thousands): Years ending December 31, 2019 $ 2,889 2020 3,474 2021 2,969 2022 3,033 2023 3,097 Thereafter 13,424 Total future minimum lease payments $ 28,886

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of components of loss before income taxes	The components of loss before income taxes are as follows (in thousands): Year Ended December 31, 2019 2018 Domestic $ (45,106 ) $ (20,748 ) Foreign (1,635 ) (164 ) Loss before income taxes $ (46,741 ) $ (20,912 )
Schedule of effective income tax rate reconciliation	A reconciliation of the difference between the federal statutory rate and the effective income tax rate as a percentage of income before taxes for the years ended December 31, 2019 and 2018 is as follows (in thousands): Year Ended December 31, 2019 2018 Amount Tax Rate Amount Tax Rate Federal statutory income tax $ (9,801 ) 21.00 % $ (4,414 ) 21.00 % State income tax, net of federal tax benefit (1,577 ) 3.38 (618 ) 2.94 Foreign tax (25 ) 0.05 22 (0.10 ) Other 328 (0.72 ) 253 (1.20 ) Valuation allowance net of deferred tax assets 12,989 (27.83 ) 4,247 (20.21 ) Stock-based compensation (1,267 ) 2.71 11 (0.05 ) Return to provision (581 ) 1.25 (45 ) 0.21 Change of rate — — 566 (2.69 ) Effective income tax rate $ 66 (0.2 )% $ 22 (0.1 )%
Schedule of deferred tax assets and liabilities	Significant components of the Company’s deferred taxes at December 31, 2019 and 2018 are as follows (in thousands): As of December 31, 2019 2018 Deferred tax assets Net operating loss carryforwards $ 30,285 $ 17,228 Operating lease liability 4,915 — Deferred rent — 3,940 Other 1,522 678 Total deferred tax assets 36,722 21,846 Deferred tax liabilities Depreciation and amortization (3,598 ) (4,193 ) Deferred commissions and bonus (2,652 ) (1,848 ) Operating lease right-of-use asset (1,345 ) — Other (847 ) (514 ) Total deferred tax liabilities (8,442 ) (6,555 ) Less: Valuation allowance (28,280 ) (15,291 ) Net deferred tax asset (liability) $ — $ —

Convertible Preferred Stock a_2

Convertible Preferred Stock and Stockholders’ Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Schedule of Preferred Stock	As of December 31, 2018 , the Company had the following preferred stock outstanding (in thousands, except share and per share data): As of December 31, 2018 Series Issue Date Shares Authorized Shares Issued and Outstanding Carrying Amount Aggregate Liquidation Preference Issuance Price Per Share Series A convertible preferred stock (“Series A”) April and June 2010 2,690,403 2,690,403 $ 448 $ 448 $ 0.1667 Series A-1 convertible preferred stock (“Series A-1”) October 2010 1,600,000 1,600,000 800 800 0.5000 Series B convertible preferred stock (“Series B”) February 2011 6,108,000 6,108,000 9,961 9,999 1.6370 Series B-1 convertible preferred stock (“Series B-1”) June 2014 2,492,570 2,449,700 9,663 9,714 3.9655 Series C convertible preferred stock (“Series C”) February 2016 6,989,863 6,989,863 41,799 42,000 6.0087 Series D convertible preferred stock (“Series D”) December 2018 2,176,297 2,176,297 40,305 40,500 18.6096 Total all series 22,057,133 22,014,263 $ 102,976 $ 103,461

Incentive Stock Plan (Tables)

Incentive Stock Plan (Tables)	6 Months Ended	12 Months Ended
Incentive Stock Plan (Tables)	Jun. 30, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Schedule of Stock Option Activity		The table below summarizes the stock option activity for the year ended December 31, 2019 : Number of Options Weighted Average Exercise Price Weighted Average Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Outstanding at beginning of period 1,328,696 $ 0.54 3.67 $ 8,529 Granted at fair value — — Exercised (163,962 ) 0.56 Forfeited (5,157 ) 1.08 Outstanding at end of period 1,159,577 $ 0.54 2.67 $ 17,990 Options exercisable at December 31, 2019 1,159,577 $ 0.54 2.67 $ 17,990
Schedule of Stock Options by Exercise Price Range		At the end of 2015, the Company ceased issuing stock options. The following summarizes information about the Company’s options outstanding as of December 31, 2019 : Options Outstanding Options Exercisable Exercise Price Shares Weighted- Average Remaining Contractual Term Shares Weighted- (in years) (in years) $0.31 - $0.69 952,867 2.1 952,867 2.1 $0.70 - $1.07 35,000 4.5 35,000 4.5 $1.08 - $1.10 101,405 5.1 101,405 5.1 $1.11 - $3.97 70,305 5.3 70,305 5.3 1,159,577 1,159,577
Summary of Restricted Stock Units		The table below summarizes the activity regarding unvested restricted stock units for the year ended December 31, 2019 : Restricted Stock Units Weighted Average Grant Date Fair Value Unvested at December 31, 2018 2,477,569 $ 6.19 Granted 1,742,551 13.32 Vested (2,024,786 ) 7.52 Forfeited (183,986 ) 6.67 Unvested at December 31, 2019 2,011,348 $ 11.02
Schedule of Stock-Based Compensation Expense	Stock-based compensation expense is included in the unaudited condensed consolidated statements of operations and comprehensive loss as follows: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 (in thousands) Cost of revenue $ 169 $ — $ 464 $ — Research and development 450 — 934 — Sales and marketing 697 — 1,166 — General and administrative 1,165 5,298 3,439 5,298 Total stock-based compensation $ 2,481 $ 5,298 $ 6,003 $ 5,298	Stock-based compensation expense is included in the consolidated statement of operations and comprehensive loss as follows (in thousands): Years Ended December 31, 2019 2018 2017 Cost of revenue $ 1,126 $ 9 $ 20 Research and development 2,290 28 161 Sales and marketing 8,697 15 259 General and administrative 13,220 1 33 Total stock-based compensation expense $ 25,333 $ 53 $ 473

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended	12 Months Ended
Commitments and Contingencies (Tables)	Jun. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of contractual commitments	Contractual commitments as of June 30, 2020 are as follows (in thousands): Years ending December 31, 2020 $ 6,786 2021 20,486 2022 27,495 2023 15,222 2024 — Thereafter — Total contract commitments $ 69,989	Contractual commitments as of December 31, 2019 are as follows (in thousands): Years ending December 31, 2020 $ 13,572 2021 20,486 2022 27,495 2023 15,222 2024 — Thereafter — Total contractual obligations $ 76,775

Segment and Geographic Data (Ta

Segment and Geographic Data (Tables)	6 Months Ended	12 Months Ended
Segment and Geographic Data (Tables)	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Schedule of revenue by geographical region	Revenue by geographical region is as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Americas $ 24,592 $ 19,542 $ 48,392 $ 37,781 EMEA 5,048 3,882 10,059 7,615 Asia Pacific 1,762 1,339 3,486 2,746 Total $ 31,402 $ 24,763 $ 61,937 $ 48,142	Revenue by geographical region is as follows (in thousands): Year Ended December 31, 2019 2018 2017 Americas $ 80,574 $ 61,501 $ 33,853 EMEA 16,220 12,674 7,914 Asia Pacific 5,913 4,638 3,048 Total $ 102,707 $ 78,813 $ 44,815

Net Loss per Share (Tables)

Net Loss per Share (Tables)	6 Months Ended	12 Months Ended
Net Loss per Share (Tables)	Jun. 30, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Schedule of basic and diluted net loss per share	The following table presents the calculation for basic and diluted net loss per share (in thousands, except share and per share data): Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Net loss attributable to common shareholders $ (8,302 ) $ (10,755 ) $ (18,782 ) $ (15,918 ) Weighted average common shares outstanding 50,527,432 16,753,014 50,263,061 16,832,105 Net loss per share, basic and diluted $ (0.16 ) $ (0.64 ) $ (0.37 ) $ (0.95 )	The following table presents the calculation for basic and diluted net loss per share (in thousands, except share and per share data): Year Ended December 31, 2019 2018 2017 Net loss attributable to common shareholders $ (46,807 ) $ (20,934 ) $ (21,910 ) Weighted average common shares outstanding 18,438,695 16,593,258 16,400,767 Net loss per share, basic and diluted $ (2.54 ) $ (1.26 ) $ (1.34 )
Schedule of shares excluded from the calculation of diluted net loss per share	The following outstanding shares of common stock equivalents were excluded from the calculation of diluted net loss per share for each period, as the impact of including them would have been anti-dilutive. The Company’s RSUs included a triggering liquidation performance condition prior to vesting. As such, these are treated as contingently issuable shares and were excluded from potential dilutive impact until the triggering liquidation performance condition was satisfied upon completion of the IPO on December 17, 2019. June 30, 2020 2019 Stock options outstanding 416,081 1,275,473 RSUs 2,155,006 — Convertible preferred stock — 22,014,263 Warrants — 35,305 Total potentially dilutive shares 2,571,087 23,325,041	The following outstanding shares of common stock equivalents were excluded from the calculation of diluted net loss per share for each period, as the impact of including them would have been anti-dilutive. The Company’s RSUs included a triggering liquidation performance condition prior to vesting. As such, these were treated as contingently issuable shares and were excluded from potential dilutive impact until the triggering liquidation performance condition was satisfied upon completion of the IPO on December 17, 2019. As of December 31, 2019 2018 2017 Stock options outstanding 1,159,577 1,313,121 1,523,328 RSUs outstanding 2,364,650 — Convertible preferred stock — 19,945,290 19,837,966 Warrants 35,305 35,305 35,305 Total potentially dilutive shares 3,559,532 21,293,716 21,396,599

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
Fair Value Measurements (Tables)	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of financial assets measured at fair value	The following tables present information about the Company’s financial assets that are measured at fair value and indicate the fair value hierarchy of the valuation inputs used (in thousands): June 30, 2020 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 75,147 $ — $ — $ 75,147 Marketable Securities: Corporate bonds — 23,061 — 23,061 Commercial paper — 16,444 — 16,444 U.S. Treasury securities — 10,166 — 10,166 Total assets $ 75,147 $ 49,671 $ — $ 124,818 December 31, 2019 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 129,280 $ — $ — $ 129,280 Total assets $ 129,280 $ — $ — $ 129,280

Nature of Operations and Summ_4

Nature of Operations and Summary of Significant Accounting Policies - Initial Public Offering and Over Allotment Offering (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 15, 2020	Dec. 17, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Offering expenses			$ 216	$ 529	$ 5,227	$ 0	$ 0
Common Stock, shares authorized (in shares)						46,000,000
Preferred Stock, shares authorized (in shares)		10,000,000			10,000,000
Class A common stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Common Stock, shares authorized (in shares)		1,000,000,000	1,000,000,000		1,000,000,000
Class A common stock \| IPO
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Shares issued and sold in offering (in shares)		8,823,530
Price per share (in dollar per share)		$ 17
Aggregate gross offering price		$ 150,000
Total proceeds from offering		134,300
Payments for underwriting expense		10,500
Offering expenses		$ 5,200
Class A common stock \| Over-allotment option
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Shares issued and sold in offering (in shares)	629,603
Total proceeds from offering	$ 10,000
Class B common stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Common Stock, shares authorized (in shares)		25,000,000	25,000,000		25,000,000
Common Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Conversion of stock (in shares)		22,014,263			22,014,263

Nature of Operations and Summ_5

Nature of Operations and Summary of Significant Accounting Policies - Accounts Receivable and Allowance for Doubtful Accounts (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020USD ($)segment	Jun. 30, 2019USD ($)	Dec. 31, 2019USD ($)segment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments \| segment	1		1
Bad debt expense	$ 1,340	$ 685	$ 2,208	$ 793	$ 86
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 706	$ 374	374
Additions			1,920
Write-offs, net of recoveries			(1,588)
Ending balance			$ 706	$ 374

Nature of Operations and Summ_6

Nature of Operations and Summary of Significant Accounting Policies - Property and Equipment, Goodwill and Impairment of Long-Lived Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Goodwill impairment loss	$ 0	$ 0
Impairment of long-lived assets	$ 0	$ 0
Minimum \| Computer equipment and hardware
Property, Plant and Equipment [Line Items]
Useful life	3 years
Minimum \| Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful life	3 years
Maximum \| Computer equipment and hardware
Property, Plant and Equipment [Line Items]
Useful life	5 years
Maximum \| Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful life	7 years

Nature of Operations and Summ_7

Nature of Operations and Summary of Significant Accounting Policies - Sales Commissions, Advertising Costs and Deferred Offering Costs (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 17, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Increase in deferred commissions			$ 3,300	$ 4,200
Incremental costs of obtaining contract with customer	$ 5,417	$ 2,748	8,170	6,964	$ 3,063
Amortization of deferred commissions	$ 3,414	$ 2,126	4,812	2,795	1,358
Advertising costs			$ 2,400	$ 1,500	$ 4,600
Deferred offering costs						$ 5,800

Nature of Operations and Summ_8

Nature of Operations and Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset		$ 10,443	$ 5,618
Operating lease liability		1,941	2,331
Operating lease liability, net of current portion		$ 22,889	$ 18,196	$ 0
Decrease in deferred rent				$ (14,651)
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset	$ 6,700
Operating lease liability	1,800
Operating lease liability, net of current portion	20,300
Decrease in accrued liabilities and other	700
Decrease in deferred rent	$ 14,700

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
Revenue Recognition (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Increase in deferred revenue			$ 5,690	$ 2,848	$ 8,235	$ 7,162	$ 5,404
Additional invoices					111,000	86,000
Revenue	$ 31,402	$ 24,763	61,937	48,142	102,707	78,813	$ 44,815
Revenue recognized previously deferred	16,400	$ 11,400	22,300	$ 16,600	20,900	$ 14,100
Revenue expected to be recognized	$ 50,900		$ 50,900		$ 42,100
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized, percentage					91.00%
Revenue, remaining performance obligation, period					12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized, percentage	86.00%		86.00%
Revenue, remaining performance obligation, period	12 months		12 months

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total property and equipment			$ 20,631	$ 20,133
Less: Accumulated depreciation			(7,102)	(4,609)
Total property and equipment, net	$ 13,410		13,529	15,524
Depreciation	$ 1,434	$ 1,335	2,736	2,441	$ 1,233
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment			15,075	15,045
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment			3,630	3,498
Computer equipment and hardware
Property, Plant and Equipment [Line Items]
Total property and equipment			$ 1,926	$ 1,590

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 8,680	$ 8,680
Less: Accumulated amortization	(3,198)	(1,666)
Intangible assets, net	5,482	7,014
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	7,300	7,300
Less: Accumulated amortization	(2,169)	(1,126)
Trademark
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	120	120
Less: Accumulated amortization	(120)	(65)
Technology platform
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	1,150	1,150
Less: Accumulated amortization	(799)	(415)
Noncompetition agreement
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	110	110
Less: Accumulated amortization	$ (110)	$ (60)

Intangible Assets - Amortizatio

Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 713	$ 771	$ 1,532	$ 1,545	$ 121
2020			1,394
2021			1,043
2022			1,043
2023			1,043
2024			959
Intangible assets, net			$ 5,482	$ 7,014

Intangible Assets - Amortizat_2

Intangible Assets - Amortization Periods (Details) - Weighted average	12 Months Ended
	Dec. 31, 2019
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	7 years
Trademark
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	2 years
Technology platform
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	3 years
Noncompetition agreement
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	2 years

Operating Leases - Narrative (D

Operating Leases - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
Operating Leases - Narrative (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 23, 2020	Jan. 21, 2020
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 733,000	$ 592,000	$ 1,407,000	$ 1,202,000	$ 2,300,000
Variable lease expense	806,000	858,000	1,582,000	1,681,000	2,800,000
Rent expense						$ 4,700,000	$ 2,200,000
Sublease income	102,000	$ 131,000	203,000	280,000	500,000
Sublease rental income						$ 400,000
Operating lease, right-of-use asset	10,443,000		10,443,000		5,618,000
Operating lease liability	$ 24,830,000		24,830,000		20,527,000
Payments related to operating leases			$ 3,200,000	$ 2,700,000	$ 5,600,000
Weighted-average remaining lease term	8 years 2 months 12 days		8 years 2 months 12 days		7 years 10 months 24 days
Weighted-average discount rate	5.70%		5.70%		6.00%
Minimum
Lessee, Lease, Description [Line Items]
Monthly rental payments			$ 17,000		$ 17,000
Maximum
Lessee, Lease, Description [Line Items]
Monthly rental payments			$ 280,000		$ 280,000
Lease Commenced In August 2020 Expiring In December 2030
Lessee, Lease, Description [Line Items]
Expected total future commitment									$ 10,000,000
Lease Commenced in August 2020 Expiring In November 2030
Lessee, Lease, Description [Line Items]
Expected total future commitment									$ 7,900,000
Lease Commenced on January 23, 2020
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset								$ 5,400,000
Operating lease liability								$ 5,400,000

Operating Leases - Summary of o

Operating Leases - Summary of operating lease assets and liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease, right-of-use asset	$ 10,443	$ 5,618
Operating lease liability	1,941	2,331
Operating lease liability, net of current portion	22,889	18,196	$ 0
Total operating lease liabilities	$ 24,830	$ 20,527

Operating Leases - Lease cost (

Operating Leases - Lease cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Leases [Abstract]
Operating lease expense	$ 733	$ 592	$ 1,407	$ 1,202	$ 2,300
Variable lease expense	806	858	1,582	1,681	2,800
Sublease income	$ 102	$ 131	$ 203	$ 280	$ 500

Operating Leases - Remaining ma

Operating Leases - Remaining maturities of operating lease liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
2020	$ 1,536	$ 3,474
2021	3,840	2,969
2022	3,930	3,033
2023	4,021	3,097
2024	4,117	3,165
Thereafter	16,353	10,108
Total future minimum lease payments	33,797	25,846
Less: imputed interest	(6,971)	(5,319)
Less: lease incentives	(1,996)
Total operating lease liabilities	$ 24,830	$ 20,527

Operating Leases - Future Minim

Operating Leases - Future Minimum Lease Payments (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 2,889
2020	3,474
2021	2,969
2022	3,033
2023	3,097
Thereafter	13,424
Total future minimum lease payments	$ 28,886

Income Taxes - Components of Pr

Income Taxes - Components of Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Domestic					$ (45,106)	$ (20,748)
Foreign					(1,635)	(164)
Loss before income taxes	$ (8,284)	$ (10,736)	$ (18,761)	$ (15,888)	$ (46,741)	$ (20,912)	$ (21,910)

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amount
Federal statutory income tax					$ (9,801)	$ (4,414)
State income tax, net of federal tax benefit					(1,577)	(618)
Foreign tax					(25)	22
Other					328	253
Valuation allowance net of deferred tax assets					12,989	4,247
Stock-based compensation					(1,267)	11
Return to provision					(581)	(45)
Change of rate					0	566
Effective income tax rate	$ 18	$ 19	$ 21	$ 30	$ 66	$ 22	$ 0
Tax Rate
Federal statutory income tax					21.00%	21.00%
State income tax, net of federal tax benefit					3.38%	2.94%
Foreign tax					0.05%	(0.10%)
Other					(0.72%)	(1.20%)
Valuation allowance net of deferred tax assets					(27.83%)	(20.21%)
Stock-based compensation					2.71%	(0.05%)
Return to provision					1.25%	0.21%
Change of rate					0.00%	(2.69%)
Effective income tax rate					(0.20%)	(0.10%)

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Net operating loss carryforwards	$ 30,285	$ 17,228
Operating lease liability	4,915	0
Deferred rent	0	3,940
Other	1,522	678
Total deferred tax assets	36,722	21,846
Deferred tax liabilities
Depreciation and amortization	(3,598)	(4,193)
Deferred commissions and bonus	(2,652)	(1,848)
Operating lease right-of-use asset	(1,345)	0
Other	(847)	(514)
Total deferred tax liabilities	(8,442)	(6,555)
Less: Valuation allowance	(28,280)	(15,291)
Net deferred tax asset (liability)	$ 0	$ 0

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
Income Taxes - Narrative (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance	$ 13,000,000
Unrecognized tax benefits, income tax penalties and interest accrued	0	$ 0
Federal tax authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	25,900,000
State and local jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 4,400,000

Revolving Line of Credit (Detai

Revolving Line of Credit (Details)	Nov. 26, 2019USD ($)	Jan. 22, 2020USD ($)	Dec. 31, 2019USD ($)letter_of_credit	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Number of standby letters of credit \| letter_of_credit			2
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 40,000,000
Outstanding balance			0	$ 0
Streamline balance	$ 75,000,000
Interest rate	4.75%
Reduction in borrowing capacity		$ 800,000	$ 3,200,000	$ 3,200,000
Revolving Credit Facility \| Line of Credit \| Prime Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%

Convertible Preferred Stock a_3

Convertible Preferred Stock and Stockholders’ Equity - Narrative (Details)	Dec. 17, 2019shares	Dec. 31, 2019vote$ / sharesshares	Jun. 30, 2020$ / sharesshares	Dec. 31, 2018$ / sharesshares
Class of Stock [Line Items]
Common Stock, shares authorized (in shares)				46,000,000
Common stock, par value (in dollars per share) \| $ / shares				$ 0.0001
Maximum combined voting power, percent		10.00%
Period from closing of initial public offering		7 years
Common stock, shares outstanding (in shares)				16,697,109
Preferred stock, shares outstanding (in shares)		0
Class A common stock
Class of Stock [Line Items]
Common Stock, shares authorized (in shares)	1,000,000,000	1,000,000,000	1,000,000,000
Common stock, par value (in dollars per share) \| $ / shares		$ 0.0001	$ 0.0001
Number of votes \| vote		1
Common stock, shares outstanding (in shares)		39,041,065	40,961,808
Class B common stock
Class of Stock [Line Items]
Common Stock, shares authorized (in shares)	25,000,000	25,000,000	25,000,000
Common stock, par value (in dollars per share) \| $ / shares		$ 0.0001	$ 0.0001
Number of votes \| vote		10
Conversion feature (in shares)		1
Common stock, shares outstanding (in shares)		9,803,933	9,927,749
Convertible preferred stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)		0		22,014,263
Common Stock
Class of Stock [Line Items]
Conversion of stock (in shares)	22,014,263	22,014,263

Convertible Preferred Stock a_4

Convertible Preferred Stock and Stockholders’ Equity - Schedule Of Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2019	Dec. 17, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0
Preferred stock, shares outstanding (in shares)	0
Carrying Amount	$ 0		$ 0
Series A convertible preferred stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)			2,690,403
Preferred stock, shares issued (in shares)			2,690,403
Preferred stock, shares outstanding (in shares)			2,690,403
Carrying Amount	0		$ 448
Aggregate Liquidation Preference			$ 448
Issuance Price Per Share (in dollars per share)			$ 0.1667
Series A-1 convertible preferred stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)			1,600,000
Preferred stock, shares issued (in shares)			1,600,000
Preferred stock, shares outstanding (in shares)			1,600,000
Carrying Amount	0		$ 800
Aggregate Liquidation Preference			$ 800
Issuance Price Per Share (in dollars per share)			$ 0.5000
Series B convertible preferred stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)			6,108,000
Preferred stock, shares issued (in shares)			6,108,000
Preferred stock, shares outstanding (in shares)			6,108,000
Carrying Amount	0		$ 9,961
Aggregate Liquidation Preference			$ 9,999
Issuance Price Per Share (in dollars per share)			$ 1.6370
Series B-1 convertible preferred stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)			2,492,570
Preferred stock, shares issued (in shares)			2,449,700
Preferred stock, shares outstanding (in shares)			2,449,700
Carrying Amount	0		$ 9,663
Aggregate Liquidation Preference			$ 9,714
Issuance Price Per Share (in dollars per share)			$ 3.9655
Series C convertible preferred stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)			6,989,863
Preferred stock, shares issued (in shares)			6,989,863
Preferred stock, shares outstanding (in shares)			6,989,863
Carrying Amount	0		$ 41,799
Aggregate Liquidation Preference			$ 42,000
Issuance Price Per Share (in dollars per share)			$ 6.0087
Series D convertible preferred stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)			2,176,297
Preferred stock, shares issued (in shares)			2,176,297
Preferred stock, shares outstanding (in shares)			2,176,297
Carrying Amount	$ 0		$ 40,305
Aggregate Liquidation Preference			$ 40,500
Issuance Price Per Share (in dollars per share)			$ 18.6096
Convertible preferred stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)			22,057,133
Preferred stock, shares issued (in shares)			22,014,263
Preferred stock, shares outstanding (in shares)	0		22,014,263
Carrying Amount			$ 102,976
Aggregate Liquidation Preference			$ 103,461

Incentive Stock Plan - Narrativ

Incentive Stock Plan - Narrative (Details) - USD ($)	Apr. 27, 2016	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 12, 2019	Oct. 17, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense			$ 2,481,000	$ 5,298,000	$ 6,003,000	$ 5,298,000	$ 25,333,000	$ 53,000	$ 473,000
Intrinsic value of options exercised							$ 2,500,000	1,100,000	800,000
2016 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	5,467,862
2019 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)											5,293,497
Class B Incentive Award Plan \| Class B common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)										550,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum exercise period							10 years
Dividend yield							0.00%
Total stock-based compensation expense							$ 0	$ 100,000	$ 500,000
Stock Options \| 2016 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum fair market value of option, percent	110.00%
Option ownership percentage	10.00%
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate							1.61%
Expected volatility							62.50%
Weighted average grant date fair value (in dollars per share)							$ 13.32	$ 6.91	$ 6.15
Unrecognized stock-based compensation expense							$ 17,400,000
Recognition period							3 years
Grants in period (in shares)							1,742,551
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense		$ 5,300,000
Chief Executive Officer \| Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		434,436
Chief Executive Officer \| Restricted Stock Awards \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net issuance (in shares)		242,155

Incentive Stock Plan - Stock Op

Incentive Stock Plan - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Number of Options
Outstanding at beginning of period (in shares)	1,328,696
Granted at fair value (in shares)	0
Exercised (in shares)	(163,962)
Forfeited (in shares)	(5,157)
Outstanding at end of period (in shares)	1,159,577	1,328,696
Exercisable at end of the period (in shares)	1,159,577
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 0.54
Granted at fair value (in dollars per share)	0
Exercised (in dollars per share)	0.56
Forfeited (in dollars per share)	1.08
Outstanding at end of period (in dollars per share)	0.54	$ 0.54
Exercisable at the end of the period (in dollars per share)	$ 0.54
Outstanding, weighted-average contractual term (years)	2 years 8 months 1 day	3 years 8 months 1 day
Exercisable, weighted-average contractual term (years)	2 years 8 months 1 day
Outstanding, aggregate intrinsic value	$ 17,990	$ 8,529
Exercisable, aggregate intrinsic value	$ 17,990

Incentive Stock Plan - Stock _2

Incentive Stock Plan - Stock Options Outstanding and Exercisable (Details)	12 Months Ended
	Dec. 31, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, shares (in shares)	1,159,577
Options exercisable, shares (in shares)	1,159,577
$0.31 - $0.69
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower range limit (in dollars per share) \| $ / shares	$ 0.31
Exercise price range, upper range limit (in dollars per share) \| $ / shares	$ 0.69
Options outstanding, shares (in shares)	952,867
Options outstanding, weighted average remaining contractual term	2 years 1 month 6 days
Options exercisable, shares (in shares)	952,867
Options exercisable, weighted average remaining contractual term	2 years 1 month 6 days
$0.70 - $1.07
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower range limit (in dollars per share) \| $ / shares	$ 0.70
Exercise price range, upper range limit (in dollars per share) \| $ / shares	$ 1.07
Options outstanding, shares (in shares)	35,000
Options outstanding, weighted average remaining contractual term	4 years 6 months
Options exercisable, shares (in shares)	35,000
Options exercisable, weighted average remaining contractual term	4 years 6 months
$1.08 - $1.10
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower range limit (in dollars per share) \| $ / shares	$ 1.08
Exercise price range, upper range limit (in dollars per share) \| $ / shares	$ 1.10
Options outstanding, shares (in shares)	101,405
Options outstanding, weighted average remaining contractual term	5 years 1 month 6 days
Options exercisable, shares (in shares)	101,405
Options exercisable, weighted average remaining contractual term	5 years 1 month 6 days
$1.11 - $3.97
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower range limit (in dollars per share) \| $ / shares	$ 1.11
Exercise price range, upper range limit (in dollars per share) \| $ / shares	$ 3.97
Options outstanding, shares (in shares)	70,305
Options outstanding, weighted average remaining contractual term	5 years 3 months 18 days
Options exercisable, shares (in shares)	70,305
Options exercisable, weighted average remaining contractual term	5 years 3 months 18 days

Incentive Stock Plan - Restrict

Incentive Stock Plan - Restricted Stock Units (Details) - Restricted Stock Units - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restricted Stock Units
Unvested at beginning of period (in shares)	2,477,569
Grants (in shares)	1,742,551
Vested (in shares)	(2,024,786)
Forfeited (in shares)	(183,986)
Unvested at end of period (in shares)	2,011,348	2,477,569
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 6.19
Granted (in dollars per share)	13.32	$ 6.91	$ 6.15
Vested (in dollars per share)	7.52
Forfeited (in dollars per share)	6.67
Unvested at end of period (in dollars per share)	$ 11.02	$ 6.19

Incentive Stock Plan - Stock-ba

Incentive Stock Plan - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 2,481	$ 5,298	$ 6,003	$ 5,298	$ 25,333	$ 53	$ 473
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	169	0	464	0	1,126	9	20
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	450	0	934	0	2,290	28	161
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	697	0	1,166	0	8,697	15	259
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 1,165	$ 5,298	$ 3,439	$ 5,298	$ 13,220	$ 1	$ 33

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
2020		$ 13,572
2020	$ 6,786
2021	20,486	20,486
2022	27,495	27,495
2023	15,222	15,222
2024	0	0
Thereafter	0	0
Total contractual obligations	$ 69,989	$ 76,775

Segment and Geographic Data (De

Segment and Geographic Data (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
Segment and Geographic Data (Details) $ in Thousands	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2020USD ($)segment	Jun. 30, 2019USD ($)	Dec. 31, 2019USD ($)segment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Segment Reporting [Abstract]
Number of operating segments \| segment			1		1
Disaggregation of Revenue [Line Items]
Total revenue	$ 31,402	$ 24,763	$ 61,937	$ 48,142	$ 102,707	$ 78,813	$ 44,815
Americas
Disaggregation of Revenue [Line Items]
Total revenue	24,592	19,542	48,392	37,781	80,574	61,501	33,853
EMEA
Disaggregation of Revenue [Line Items]
Total revenue	5,048	3,882	10,059	7,615	16,220	12,674	7,914
Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,762	$ 1,339	$ 3,486	$ 2,746	$ 5,913	$ 4,638	$ 3,048
Geographic concentration risk \| Revenue from contract with customer benchmark \| Outside of the United States
Disaggregation of Revenue [Line Items]
Concentration risk percentage			28.00%	28.00%	29.00%	30.00%	32.00%

Net Loss per Share - Basic and

Net Loss per Share - Basic and diluted net loss per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net loss attributable to common shareholders	$ (8,302)	$ (10,755)	$ (18,782)	$ (15,918)	$ (46,807)	$ (20,934)	$ (21,910)
Weighted average common shares outstanding	50,527,432	16,753,014	50,263,061	16,832,105	18,438,695	16,593,258	16,400,767
Net loss per share, basic and diluted (in dollars per share)	$ (0.16)	$ (0.64)	$ (0.37)	$ (0.95)	$ (2.54)	$ (1.26)	$ (1.34)

Net Loss per Share - Shares exc

Net Loss per Share - Shares excluded from the calculation of diluted net loss per share (Details) - shares	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive shares (in shares)	2,571,087	23,325,041	3,559,532	21,293,716	21,396,599
Stock options outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive shares (in shares)	416,081	1,275,473	1,159,577	1,313,121	1,523,328
RSUs outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive shares (in shares)	2,155,006	0	2,364,650	0
Convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive shares (in shares)	0	22,014,263	0	19,945,290	19,837,966
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive shares (in shares)	0	35,305	35,305	35,305	35,305

Employee Benefit Plan (Details)

Employee Benefit Plan (Details) - USD ($) $ in Millions	12 Months Ended
Employee Benefit Plan (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Postemployment Benefits [Abstract]
Matching contributions	$ 1.3	$ 1	$ 0.6

Related Party Transactions (Det

Related Party Transactions (Details) $ in Millions	Dec. 17, 2019USD ($)
Underwriting discounts and commissions payment \| Goldman Sachs & Co. LLC
Related Party Transaction [Line Items]
Amount of transaction with related party	$ 4.2

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	$ 124,818	$ 129,280
Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	23,061
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	16,444
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	10,166
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	75,147	129,280
Level 1 \| Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Level 1 \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Level 1 \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	49,671	0
Level 2 \| Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	23,061
Level 2 \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	16,444
Level 2 \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	10,166
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Level 3 \| Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Level 3 \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Level 3 \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	75,147	129,280
Money Market Funds [Member] \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	75,147	129,280
Money Market Funds [Member] \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Money Market Funds [Member] \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 0	$ 0

Subsequent Events (Details)

Subsequent Events (Details) - Over-allotment option - Class A common stock $ in Millions	Jan. 15, 2020USD ($)shares
Subsequent Event [Line Items]
Shares issued and sold in offering (in shares) \| shares	629,603
Total proceeds from offering	$ 10
Subsequent event
Subsequent Event [Line Items]
Shares issued and sold in offering (in shares) \| shares	629,603
Aggregate gross offering price	$ 10.7
Total proceeds from offering	$ 10