Integral Ad Science Holding (IAS) 10-Q12 Nov 242024 Q3 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page - shares	9 Months Ended
Cover Page - shares	Sep. 30, 2024	Nov. 07, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	001-40557
Entity Registrant Name	INTEGRAL AD SCIENCE HOLDING CORP.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	83-0731995
Entity Address, Address Line One	12 E 49th Street,
Entity Address, Address Line Two	20th Floor
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10017
City Area Code	646
Local Phone Number	278-4871
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	IAS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		162,670,447
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001842718
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 57,085	$ 124,759
Restricted cash	170	54
Accounts receivable, net	81,168	74,609
Unbilled receivables	48,421	46,548
Prepaid expenses and other current assets	38,030	18,959
Total current assets	224,874	264,929
Property and equipment, net	4,077	3,769
Internal use software, net	51,546	40,301
Intangible assets, net	150,618	178,908
Goodwill	675,538	675,282
Operating lease right-of-use assets	20,472	21,668
Deferred tax asset, net	2,544	2,465
Other long-term assets	5,029	4,402
Total assets	1,134,698	1,191,724
Current liabilities:
Accounts payable and accrued expenses	48,874	72,232
Operating lease liability	10,242	9,435
Due to related party	2	121
Deferred revenue	1,454	682
Total current liabilities	60,572	82,470
Deferred tax liability, net	4,989	20,367
Long-term debt, net	64,073	153,725
Operating lease liabilities, non-current	16,391	19,523
Other long-term liabilities	6,186	6,183
Total liabilities	152,211	282,268
Commitments and Contingencies (Note 13)
Stockholders’ Equity
Preferred Stock, $0.001 par value, 50,000,000 shares authorized at September 30, 2024; 0 shares issued and outstanding at September 30, 2024 and December 31, 2023.	0	0
Common Stock, $0.001 par value, 500,000,000 shares authorized, 161,955,151 and 158,757,620 shares issued and outstanding at September 30, 2024 and December 31, 2023, respectively.	162	159
Additional paid-in-capital	952,123	901,259
Accumulated other comprehensive loss	(1,276)	(916)
Retained earnings	31,478	8,954
Total stockholders’ equity	982,487	909,456
Total liabilities and stockholders’ equity	$ 1,134,698	$ 1,191,724

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares, issued (in shares)	161,955,151	158,757,620
Common stock, shares, outstanding (in shares)	161,955,151	158,757,620

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Revenue	$ 133,528	$ 120,331	$ 377,063	$ 340,074
Operating expenses:
Cost of revenue (excluding depreciation and amortization shown below)	27,373	25,599	80,628	71,100
Sales and marketing	30,144	29,604	91,541	87,566
Technology and development	16,840	17,211	52,305	53,850
General and administrative	25,348	22,611	71,407	85,673
Depreciation and amortization	16,243	14,027	47,032	40,373
Foreign exchange (gain) loss, net	(2,607)	2,078	(723)	931
Total operating expenses	113,341	111,130	342,190	339,493
Operating income	20,187	9,201	34,873	581
Interest expense, net	(1,325)	(3,109)	(4,787)	(9,747)
Net income (loss) before income taxes	18,862	6,092	30,086	(9,166)
(Provision) benefit for income taxes	(2,773)	(19,841)	(7,562)	6,240
Net income (loss)	$ 16,089	$ (13,749)	$ 22,524	$ (2,926)
Net income (loss) per share - basic (in dollars per share)	$ 0.10	$ (0.09)	$ 0.14	$ (0.02)
Net income (loss) per share - diluted (in dollars per share)	$ 0.10	$ (0.09)	$ 0.14	$ (0.02)
Weighted average shares outstanding:
Basic (in shares)	161,663,506	157,055,904	160,528,610	157,691,005
Diluted (in shares)	165,084,108	157,055,904	164,635,076	157,691,005
Other comprehensive income (loss):
Foreign currency translation adjustments	$ 892	$ (1,717)	$ (360)	$ (789)
Total comprehensive income (loss)	$ 16,981	$ (15,466)	$ 22,164	$ (3,715)

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional paid-in capital	Accumulated other comprehensive loss	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2022			153,990,128
Beginning balance at Dec. 31, 2022	$ 808,216	$ 941	$ 154	$ 810,186	$ (2,899)	$ 775	$ 941
Increase (Decrease) in Stockholders' Equity [Roll Forward]
RSUs and MSUs vested (in shares)			2,692,984
RSUs and MSUs vested	3		$ 3
ESPP purchase (in shares)			273,569
ESPP purchase	2,306			2,306
Option exercises (in shares)			641,250
Option exercises	5,584		$ 1	5,583
Stock-based compensation	65,311			65,311
Foreign currency translation adjustment	(789)				(789)
Net income (loss)	(2,926)					(2,926)
Ending balance (in shares) at Sep. 30, 2023			157,597,931
Ending balance at Sep. 30, 2023	878,646		$ 158	883,386	(3,688)	(1,210)
Beginning balance (in shares) at Jun. 30, 2023			156,279,075
Beginning balance at Jun. 30, 2023	878,214		$ 156	867,490	(1,971)	12,539
Increase (Decrease) in Stockholders' Equity [Roll Forward]
RSUs and MSUs vested (in shares)			1,102,702
RSUs and MSUs vested	1		$ 1
ESPP purchase (in shares)			162,406
ESPP purchase	1,424			1,424
Option exercises (in shares)			53,748
Option exercises	591		$ 1	590
Stock-based compensation	13,882			13,882
Foreign currency translation adjustment	(1,717)				(1,717)
Net income (loss)	(13,749)					(13,749)
Ending balance (in shares) at Sep. 30, 2023			157,597,931
Ending balance at Sep. 30, 2023	$ 878,646		$ 158	883,386	(3,688)	(1,210)
Beginning balance (in shares) at Dec. 31, 2023	158,757,620		158,757,620
Beginning balance at Dec. 31, 2023	$ 909,456		$ 159	901,259	(916)	8,954
Increase (Decrease) in Stockholders' Equity [Roll Forward]
RSUs and MSUs vested (in shares)			2,827,628
RSUs and MSUs vested	3		$ 3
ESPP purchase (in shares)			325,854
ESPP purchase	3,373			3,373
Option exercises (in shares)			44,049
Option exercises	313			313
Stock-based compensation	47,178			47,178
Foreign currency translation adjustment	(360)				(360)
Net income (loss)	$ 22,524					22,524
Ending balance (in shares) at Sep. 30, 2024	161,955,151		161,955,151
Ending balance at Sep. 30, 2024	$ 982,487		$ 162	952,123	(1,276)	31,478
Beginning balance (in shares) at Jun. 30, 2024			160,786,740
Beginning balance at Jun. 30, 2024	947,576		$ 161	934,194	(2,168)	15,389
Increase (Decrease) in Stockholders' Equity [Roll Forward]
RSUs and MSUs vested (in shares)			995,796
RSUs and MSUs vested	1		$ 1
ESPP purchase (in shares)			172,615
ESPP purchase	1,478			1,478
Stock-based compensation	16,451			16,451
Foreign currency translation adjustment	892				892
Net income (loss)	$ 16,089					16,089
Ending balance (in shares) at Sep. 30, 2024	161,955,151		161,955,151
Ending balance at Sep. 30, 2024	$ 982,487		$ 162	$ 952,123	$ (1,276)	$ 31,478

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (UNAUDITED) (Parenthetical)	12 Months Ended
	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-13 [Member]

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income (loss)	$ 22,524	$ (2,926)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	47,032	40,373
Stock-based compensation	47,185	65,641
Foreign currency (gain) loss, net	(1,775)	571
Deferred tax benefit	(15,457)	(17,974)
Amortization of debt issuance costs	348	348
Allowance for credit losses	949	2,223
Impairment of assets	37	0
Changes in operating assets and liabilities:
Increase in accounts receivable	(7,028)	(19,936)
Increase in unbilled receivables	(1,723)	(370)
(Increase) decrease in prepaid expenses and other current assets	(18,668)	5,851
(Increase) decrease in operating leases, net	(1,169)	139
Increase in other long-term assets	(696)	(27)
(Decrease) increase in accounts payable and accrued expenses and other long-term liabilities	(21,958)	148
Increase in deferred revenue	768	150
Decrease in due to/from related party	(119)	(93)
Net cash provided by operating activities	50,250	74,118
Cash flows from investing activities:
Purchase of property and equipment	(1,594)	(1,954)
Development of internal use software and other	(28,868)	(23,539)
Net cash used in investing activities	(30,462)	(25,493)
Cash flows from financing activities:
Proceeds from the Revolver	0	75,000
Repayment of long-term debt	(90,000)	(125,000)
Proceeds from exercise of stock options	313	5,584
Cash received from Employee Stock Purchase Program	2,329	2,236
Net cash used in financing activities	(87,358)	(42,180)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(67,570)	6,445
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(113)	(1,330)
Cash, cash equivalents and restricted cash at beginning of period	127,290	89,671
Cash, cash equivalents, and restricted cash, at end of period	59,607	94,786
Net cash paid during the period for:
Interest	4,613	8,880
Taxes	29,942	10,361
Non-cash investing and financing activities:
Lease liabilities arising from right of use assets	6,110	4,832
Property and Equipment, net
Non-cash investing and financing activities:
Assets acquired included in accounts payable	47	17
Software Development
Non-cash investing and financing activities:
Assets acquired included in accounts payable	$ 966	$ 1,012

Description of business

Description of business	9 Months Ended
Description of business	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of business	Description of business Integral Ad Science Holding Corp. and its wholly-owned subsidiaries (together, the “Company” or "IAS") is a leading global digital advertising verification company by revenue. The Company’s mission is to be the global benchmark for trust and transparency in digital media quality for the world’s leading brands, publishers, and platforms. The Company’s cloud-based technology platform provides actionable insights and delivers independent measurement and verification of digital advertising across all devices, channels, and formats, including desktop, mobile, connected TV (“CTV”), social, display, and video. The Company’s proprietary and Media Rating Council (the "MRC") accredited Quality Impressions ® metric is designed to verify that digital ads are served to a real person rather than a bot, in a brand-safe and suitable environment within the correct geography. The Company is an independent, trusted partner for buyers and sellers of digital advertising to increase accountability, transparency, and effectiveness in the market. The Company helps advertisers optimize their ad spend and better measure consumer engagement with campaigns across platforms, while enabling publishers to improve their inventory yield and revenue. The Company operates within the United States ("U.S.") in New York, California, and Illinois. Operations outside the U.S. include but are not limited to countries such as the United Kingdom ("U.K."), Ireland, France, Germany, Spain, Italy, Singapore, Australia, Japan, India, and the Nordics.

Basis of presentation and summa

Basis of presentation and summary of significant accounting policies	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of presentation and summary of significant accounting policies	Basis of presentation and summary of significant accounting policies This summary of significant accounting policies is presented to assist in understanding the Company’s condensed consolidated financial statements. These accounting policies have been consistently applied in the preparation of the condensed consolidated financial statements. (a) Basis of presentation The Company’s condensed consolidated financial statements are presented in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and reflect the financial position, results of operations and cash flows for all periods presented. The year-end condensed balance sheet data was derived from audited financial statements but does not include all disclosures required by U.S. GAAP. The accompanying interim Condensed Consolidated Balance Sheets as of September 30, 2024, the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss), of Cash Flows and of Changes in Stockholders’ Equity for the three and nine months ended September 30, 2024 and 2023, and the related footnote disclosures are unaudited. These unaudited interim condensed consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements and, in management’s opinion, include all adjustments necessary to state fairly the consolidated financial position of the Company. All adjustments made were of a normal recurring nature. The results for the three and nine months ended September 30, 2024 are not necessarily indicative of the results to be expected for the year ending December 31, 2024, or for any future period. The Company’s significant accounting policies are discussed in Note 2 to the consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2023, filed with the Securities and Exchange Commission (“SEC”) on February 27, 2024 (the "2023 Form 10-K") and these unaudited condensed consolidated financial statements should be read in conjunction with the 2023 Form 10-K. During the first quarter of 2024, the Company identified an immaterial error in its previously issued unaudited condensed consolidated financial statements for the three months ended March 31, 2023, six months ended June 30, 2023 and nine months ended September 30, 2023. Specifically, lease liabilities arising from right of use assets within the non-cash investing and financing supplemental disclosure included all leases rather than leases arising during the noted period. As a result, the nine months ended September 30, 2023 disclosure within the Statement of Cash Flows was revised from $29.3 million to $4.8 million. These revisions did not impact any other amounts presented in the condensed consolidated financial statements. (b) Basis of consolidation The condensed consolidated financial statements include the accounts of Integral Ad Science Holding Corp. and its wholly-owned subsidiaries. All material intercompany accounts and transactions have been eliminated in consolidation. (c) Use of estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates. Significant estimates include the estimated useful lives of intangible assets and internal use software, the allowance for credit losses, goodwill impairment testing, assumptions used to calculate equity-based compensation, and the realization of deferred tax assets. The Company bases its estimates on past experience, market conditions, and other assumptions that the Company believes are reasonable under the circumstances, and the Company evaluates these estimates on an ongoing basis. Actual results may differ from these estimates due to risks and uncertainties, including the continued uncertainty surrounding the stability of economic conditions due to high inflation, changes to fiscal and monetary policy, high interest rates, currency fluctuations, fluctuations in the financial markets and disruptions in European economies as a result of the war in Ukraine and other geopolitical issues. (d) Foreign currency The reporting currency of the Company is the U.S. dollar. The functional currency of our foreign subsidiaries is the currency of the primary economic environment in which they operate, which is their local currency. The financial statements of these subsidiaries are translated into U.S. dollars using month-end rates of exchange for assets and liabilities, and average rates of exchange for revenue, costs and expenses. Translation gains and losses are recorded in accumulated other comprehensive loss within stockholders’ equity. Transaction gains and losses including those on intercompany transactions denominated in a currency other than the functional currency of the entity involved are included in foreign exchange (gain) loss, net in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). For the three months ended September 30, 2024, and 2023, foreign exchange (gain) loss, net consists of unrealized foreign exchange gains of $3,339 and losses of $1,810, respectively, and realized transaction losses of $732 and $268, respectively. For the nine months ended September 30, 2024, and 2023, foreign exchange (gain) loss, net consists of unrealized foreign exchange gains of $1,775 and losses of $571, respectively, and realized transaction losses of $1,052 and $360, respectively. (e) Cash, cash equivalents, and restricted cash Cash equivalents include money market accounts and other highly liquid investments with an original maturity date of three months or less at the time of purchase. Cash amounts with restrictions are classified as restricted cash within the Condensed Consolidated Balance Sheets. The Company generated interest income of $661 and $646 during the three months ended September 30, 2024, and 2023, respectively, and $2,342 and $1,926 during the nine months ended September 30, 2024, and 2023, respectively. The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheets to the amounts shown in the Condensed Consolidated Statements of Cash Flows. September 30, 2024 December 31, 2023 Cash and cash equivalents $ 57,085 $ 124,759 Short-term restricted cash 170 54 Long-term restricted cash (held in other long-term assets) 2,352 2,477 Total cash, cash equivalents, and restricted cash shown in the Condensed Consolidated Statements of Cash Flows $ 59,607 $ 127,290 (f) Accounts receivable, net Accounts receivable are carried at the original invoiced amount less an allowance for credit losses. The allowance is estimated by pooling accounts receivables based on similar risk characteristics, and expected credit loss exposure is evaluated for each accounts receivable pool. Invoices are typically issued with net 30-days to net 90-days terms. Account balances are considered delinquent if payment is not received by the due date, and the receivables are written off when deemed uncollectible. These costs are recorded in general and administrative expenses within the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). The activity in our allowance for credit losses consists of the following as of: September 30, 2024 September 30, 2023 Balance, beginning of period $ 8,645 $ 6,691 Additional provision 949 2,223 Receivables written off and impact of exchange rates (278) (406) Adoption of ASC 326 — (1,271) Balance, end of period $ 9,316 $ 7,237 (g) Stock-based compensation Stock-based compensation is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period, which is generally the vesting period. The Company accounts for forfeitures as they occur. The Company used the following assumptions in valuing its market stock units ("MSUs"), shares granted under the Company's 2021 Employee Stock Purchase Program ("ESPP"), time-based service options, which vest over a period of time subject to continued employment ("Time-Based Options"), and return-target options ("Return-Target Options"), which vest upon a realized cash return of the equity investment of funds affiliated with Vista Equity Partners ("Vista"), the Company’s largest shareholder. Expected term — For time-based awards, the estimated expected term of options granted is generally calculated as the vesting period plus the midpoint of the remaining contractual term, as the Company does not have sufficient historical information to develop reasonable expectations surrounding future exercise patterns and post-vesting employment termination behavior. For awards subject to market and performance conditions, the expected term represents the period of time that the options granted are expected to be outstanding. Expected volatility — Volatility is estimated based upon observed option-implied volatilities for the Company in addition to a group of peer companies. The Company believes this is the best estimate of the expected volatility over the weighted-average expected term of its option grants. Risk-free interest rate — The risk-free interest rate is based on the implied yield currently available on U.S. Treasury instruments with terms approximately equal to the expected term of the option. Expected dividend — The expected dividend assumption was based on the Company’s history and expectation of dividend payouts. The Company currently has no history or expectation of paying cash dividends on its common stock. Fair value — Following the pricing of the Initial Public Offering, the Company’s shares have traded publicly, and accordingly the Company uses the applicable closing price of its common stock to determine fair value. The Company used the following assumptions in valuing its stock-based compensation: September 30, 2024 September 30, 2023 Estimated fair value $3.19 - $14.86 $3.35 - $38.36 Expected volatility (%) 50% - 66% 50% - 65% Expected term (in years) 0.50 - 4.00 0.26 - 4.00 Risk-free interest rate (%) 4.26% - 5.15% 3.63% - 5.55% Dividend yield — — (h) Accounting pronouncements not yet adopted On November 27, 2023, the FASB issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures," which requires incremental disclosures related to an entity's reportable segments. This ASU is effective for annual periods beginning after December 15, 2023. The Company does not expect the adoption of ASU 2023-07 to have a material impact on its consolidated financial statements. On December 14, 2023, the FASB issued ASU 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures," which requires companies to disclose more detailed information in their reconciliation of their statutory tax rate to their effective tax rate. The ASU also requires entities to disclosure more detailed information about income taxes paid, including by jurisdiction, pretax income (or loss) from continuing operations and income tax expense (or benefit). This ASU is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2024. The Company is currently evaluating the impact of the adoption of ASU No. 2023-09 on its consolidated financial statements.

Property and equipment, net

Property and equipment, net	9 Months Ended
Property and equipment, net	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Property and equipment, net	Property and equipment, net Property and equipment consisted of the following: Estimated September 30, 2024 December 31, 2023 Computer and office equipment 1 - 3 years $ 4,985 $ 4,070 Computer software 3 - 5 years 218 218 Leasehold improvements Various 2,944 2,535 Furniture 5 years 610 585 Total property and equipment 8,757 7,408 Less: accumulated depreciation (4,680) (3,639) Total property and equipment, net $ 4,077 $ 3,769

Internal use software, net

Internal use software, net	9 Months Ended
Internal use software, net	Sep. 30, 2024
Internal Use Software [Abstract]
Internal use software, net	Internal use software, net Internal use software consisted of the following: Estimated September 30, 2024 December 31, 2023 Internal use software 3 - 5 years $ 98,831 $ 69,797 Less: asset impairments (37) (33) Less: accumulated amortization (47,248) (29,463) Total internal use software, net $ 51,546 $ 40,301 Amortization expense related to internal use software for the three months ended September 30, 2024 and 2023 was $6,565 and $4,032, respectively. Amortization expense related to internal use software for the nine months ended September 30, 2024 and 2023 was $17,747 and $10,477, respectively. During the nine months ended September 30, 2024, the Company wrote-off $37 of costs related to projects that were no longer being implemented, which the Company recorded in general and administrative expenses within the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss).

Intangible assets, net

Intangible assets, net	9 Months Ended
Intangible assets, net	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, net	Intangible assets, net The gross book value, accumulated amortization, net book value and amortization periods of the intangible assets were as follows: September 30, 2024 Estimated Gross book Accumulated Net book value Weighted Customer relationships 5 - 15 years $ 302,003 $ (163,960) $ 138,043 7.9 years Developed technology 5 years 137,414 (130,050) 7,364 2.0 years Trademarks 5 - 9 years 19,700 (14,489) 5,211 2.6 years Total $ 459,117 $ (308,499) $ 150,618 December 31, 2023 Estimated Gross book Accumulated Net book value Weighted Customer relationships 5 - 15 years $ 301,994 $ (142,135) $ 159,859 8.6 years Developed technology 5 years 137,361 (125,426) 11,935 2.6 years Trademarks 5 - 9 years 19,700 (12,604) 7,096 3.4 years Favorable leases 6 years 198 (180) 18 0.5 years Total $ 459,253 $ (280,345) $ 178,908

Goodwill

Goodwill	9 Months Ended
Goodwill	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill The following table provides a roll forward of the changes in the goodwill balance: Goodwill as of December 31, 2023 $ 675,282 Impact of exchange rates 256 Goodwill as of September 30, 2024 $ 675,538

Accounts payable and accrued ex

Accounts payable and accrued expenses and other long-term liabilities	9 Months Ended
	Sep. 30, 2024
Payables and Accruals [Abstract]
Accounts payable and accrued expenses and other long-term liabilities	Accounts payable and accrued expenses and other long-term liabilities Accounts payable and accrued expenses consisted of the following: September 30, 2024 December 31, 2023 Accounts payable $ 3,837 $ 12,092 Accrued payroll 5,439 9,250 Accrued professional fees 2,538 3,281 Accrued bonuses and commissions 17,079 20,413 Accrued revenue sharing 4,663 4,136 Taxes payable 2,736 6,436 Accrued hosting fees 4,895 9,475 Other accrued expenses 7,687 7,149 Total accounts payable and accrued expenses $ 48,874 $ 72,232 Other long-term liabilities consisted of the following: September 30, 2024 December 31, 2023 Security deposit received $ 672 $ 672 Uncertain tax positions 5,514 5,511 Total other long-term liabilities $ 6,186 $ 6,183

Long-term debt

Long-term debt	9 Months Ended
Long-term debt	Sep. 30, 2024
Debt Disclosure [Abstract]
Long-term debt	Long-term debt On September 29, 2021, the Company entered into a credit agreement with various lenders, which was amended on June 23, 2023 (as amended, the "Credit Agreement”). The Credit Agreement provides for an initial $300,000 in commitments for revolving credit loans (the “Revolver”), which amount may be increased or decreased under specific circumstances, with a $30,000 letter of credit sublimit and a $100,000 alternative currency sublimit. In addition, the Credit Agreement provides for the ability to request incremental term loan facilities, in a minimum amount of $5,000 for each facility. Borrowings pursuant to the Credit Agreement may be used for working capital and other general corporate purposes, including for acquisitions permitted under the Credit Agreement. During the nine months ended September 30, 2024, the Company paid down $90,000 on the Revolver. Borrowings under the Credit Agreement are scheduled to mature on September 29, 2026. The Credit Agreement contains certain customary events of default including failure to make payments when due thereunder, and failure to observe or perform certain covenants. In connection with the entry into the Revolver, the Company incurred costs of $2,318 that are included in Long-term debt, net, in the Condensed Consolidated Balance Sheets. The interest rates for the Revolver under the Credit Agreement (i) for U.S. dollar loans are equal to the applicable rate for base rate loans ranging from 0.75% to 1.50% per annum, (ii) for Term SOFR Loans (as defined in the Credit Agreement) ranging from 1.75% to 2.50% per annum, (iii) for RFR Loans (as defined in the Credit Agreement) denominated in sterling ranging from 1.7826% to 2.5326%, and (iv) for RFR Loans denominated in euro range from 1.7956% to 2.5456%, in each case, based on the Senior Secured Net Leverage Ratio (as defined in the Credit Agreement). Base rate borrowings may only be made in dollars. The Company is required to pay a commitment fee during the term of the Credit Agreement ranging from 0.20% to 0.35% per annum of the average daily undrawn portion of the revolving commitments based on the Senior Secured Net Leverage Ratio. The interest rate on September 30, 2024 was 6.9%. Any borrowings under the Credit Agreement may be repaid, in whole or in part, at any time and from time to time without premium or penalty other than customary breakage costs, and any amounts repaid may be reborrowed. No mandatory prepayments will be required other than when borrowings and letter of credit usage exceed the aggregate commitment of all lenders. The Credit Agreement contains covenants requiring certain financial information to be submitted quarterly and annually. In addition, the Company is also required to comply with certain financial covenants such as maintaining a Total Net Leverage Ratio (as defined in the Credit Agreement) of 3.50 to 1.00 or lower and maintaining a minimum Interest Coverage Ratio (as defined in the Credit Agreement) of 2.50 to 1.00. As of September 30, 2024, the Company was in compliance with all covenants contained in the Credit Agreement. September 30, 2024 December 31, 2023 Revolver $ 65,000 $ 155,000 Less: unamortized debt issuance costs (927) (1,275) Total carrying amount $ 64,073 $ 153,725 Amortization of debt issuance costs for the three months ended September 30, 2024 and 2023 was $116 in both periods. Amortization of debt issuance costs for the nine months ended September 30, 2024 and 2023 was $348 in both periods. Amortization of debt issuance costs is recorded to interest expense, net on the Company's Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). The Company recognized interest expense of $1,870 and $3,639 during the three months ended September 30, 2024 and 2023, respectively. The Company recognized interest expense of $6,781 and $11,326 during the nine months ended September 30, 2024 and 2023, respectively. Future principal payments of long-term debt as of September 30, 2024 are as follows: Year Ending 2024 $ — 2025 — 2026 65,000 $ 65,000

Income taxes

Income taxes	9 Months Ended
Income taxes	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income taxes	Income taxes At the end of each interim period, the Company estimates the annual expected effective income tax rate and applies that rate to its ordinary year-to-date earnings or loss. The income tax provision or benefit related to significant, unusual, or extraordinary items, if applicable, that will be separately reported or reported net of their related tax effects are individually computed and recognized in the interim period in which they occur. In addition, the effect of changes in enacted tax laws or rates, tax status, judgment on the realizability of a beginning-of-the-year deferred tax asset in future years or unrecognized tax benefits is recognized in the interim period in which the change occurs. The computation of the annual expected effective income tax rate at each interim period requires certain estimates and assumptions including, but not limited to, the expected pre-tax income (or loss) for the year, projections of the proportion of income (and/or loss) earned and taxed in foreign jurisdictions, permanent and temporary differences, and the likelihood of the realization of deferred tax assets generated in the current year. The accounting estimates used to compute the provision or benefit for income taxes may change as new events occur, more experience is acquired, additional information is obtained or the Company’s tax environment changes. To the extent that the expected annual effective income tax rate changes during a quarter, the effect of the change on prior quarters is included in income tax provision in the quarter in which the change occurs. For the three months ended September 30, 2024 and 2023, the Company recorded an income tax provision of $2,773 and $19,841, respectively. The Company’s effective tax rate for the three months ended September 30, 2024 and 2023 was 14.7% and 325.7%, respectively. The Company's effective tax rate for the three months ended September 30, 2024 is lower than for the respective three months ended September 30, 2023, primarily due to non-deductible stock-based compensation, tax credits and other permanent tax differences and discrete items. For the nine months ended September 30, 2024 and 2023, the Company recorded an income tax provision of $7,562 and income tax benefit of $6,240, respectively. The Company’s effective tax rate for the nine months ended September 30, 2024 and 2023 was 25.1% and 68.1%, respectively. The Company's effective tax rate for the nine months ended September 30, 2024 is lower than the nine months ended September 30, 2023, primarily due to non-deductible executive compensation, tax credits and other permanent tax differences and discrete items. The Company recognizes interest and, if applicable, penalties related to unrecognized tax benefits in the income tax provision. The Company is under examination in various states for the 2021 tax year. We believe that we have made adequate provision for all income tax uncertainties that could result from the examination.

Segment data

Segment data	9 Months Ended
Segment data	Sep. 30, 2024
Segment Reporting [Abstract]
Segment data	Segment data Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker (“CODM”), in deciding how to allocate resources and in assessing performance. The Company’s Chief Executive Officer is the CODM. The Company manages its operations as a single segment for the purpose of assessing and making operating decisions. The CODM allocates resources and assesses performance based upon financial information at the consolidated level. Since the Company operates in one operating segment, all required financial segment information can be found in the condensed consolidated financial statements. The following table summarizes revenue by geographic area: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 North and South America (“Americas”) $ 92,681 $ 83,419 $ 260,074 $ 236,610 Europe, Middle East and Africa (“EMEA”) 31,492 27,649 89,524 78,201 Asia and Pacific Rim (“APAC”) 9,355 9,263 27,465 25,263 Total revenue $ 133,528 $ 120,331 $ 377,063 $ 340,074 For the three months ended September 30, 2024 and 2023, revenue in the U.S. was $87,689 and $78,777, respectively. For the nine months ended September 30, 2024 and 2023, revenue in the U.S. was $246,471 and $224,743, respectively. The following table summarizes long lived assets, net by geographic area: September 30, 2024 December 31, 2023 Americas $ 11,615 $ 13,848 EMEA 8,250 8,577 APAC 4,684 3,012 Total long-lived assets $ 24,549 $ 25,437

Stock-based compensation

Stock-based compensation	9 Months Ended
Stock-based compensation	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Stock-based compensation	Stock-based compensation Total stock-based compensation expense for all equity arrang ements for the three and nine months e nded September 30, 2024 and 2023 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Cost of revenue $ 80 $ 118 $ 286 $ 328 Sales and marketing 4,829 5,714 14,002 17,859 Technology and development 4,941 2,902 14,139 13,434 General and administrative 6,593 5,166 18,758 34,020 Total $ 16,443 $ 13,900 $ 47,185 $ 65,641 The Company maintains multiple stock-based incentive compensation plans. Expense relating to outstanding awards under such plans is summarized as follows: Three Months Ended September 30, Nine Months Ended September 30, Unamortized Expense as of Weighted 2024 2023 2024 2023 September 30, 2024 Time-Based Options 2018 Plan $ 111 $ 1,727 $ 747 $ 3,544 2021 Plan 536 536 1,605 1,740 Total Time-Based Options expense $ 647 $ 2,263 $ 2,352 $ 5,284 $ 1,641 0.7 years Return-Target Options 2018 Plan $ — $ (2,111) $ — $ 18,215 2021 Plan — — — 3,124 Total Return-Target Options expense $ — $ (2,111) $ — $ 21,339 $ — 0.0 years LTIP expense (2018 Plan) $ — $ 16 $ — $ 333 Other equity awards under 2021 Plan Restricted Stock Units ("RSUs") $ 10,444 $ 8,760 $ 30,529 $ 25,483 $ 103,107 2.8 years Market Stock Units ("MSUs") 4,976 4,632 13,000 12,194 22,270 3.2 years Other equity awards under 2021 Plan expense $ 15,420 $ 13,392 $ 43,529 $ 37,677 $ 125,377 Employee Stock Purchase Plan "ESPP" $ 376 $ 340 $ 1,304 $ 1,008 Total Stock-Based Compensation expense $ 16,443 $ 13,900 $ 47,185 $ 65,641 $ 127,018 Integral Ad Science Holding Corp. Amended and Restated 2018 Non-Qualified Stock Option Plan On August 1, 2018, the Company adopted the 2018 Non-Qualified Stock Option Plan (“2018 Plan”). Under the 2018 Plan, the Company issued (i) Time-Based Options that vest over four years with 25% vesting after twelve months and an additional 6.25% vesting at the end of each successive quarter thereafter; and (ii) Return-Target Options that were to vest upon the first to occur of sale of the Company, or, sale or transfer to any third party of shares, as a result of which, any person or group other than Vista, obtains possession of voting power to elect a majority of the Board or any other governing body and the achievement of a total equity return multiple of 3.0 or greater. The 2018 Plan contained a provision wherein, the Time-Based Options could be repurchased by the Company at cost upon resignation of the employee. Due to this repurchase feature, the Time-Based Options did not provide the employee with the potential benefits associated with a stock award holder, and therefore, these awards were not accounted for as a stock-based award under ASC 718, Compensation - Stock Compensation but instead, compensation cost was recognized when the benefit to the employee was determined to be probable. The Return-Target Options were considered to contain both market (total stockholder return threshold) and performance (exit event) conditions. As such, the award was measured on the date of grant. Since the conditions for vesting related to the Return-Target Options were not met prior to the IPO, no stock-based compensation was recognized in the pre-IPO financial statements of the Company. During the three months ended June 30, 2023, with the filing of a “shelf” registration statement on Form S-3, the market condition and the implied performance condition relating to the Return-Target Options were deemed to be probable, and $23,450 was recognized in that period. In connection with the IPO, the 2018 Plan was amended and restated (the “Amended and Restated 2018 Plan”) with the following modifications: (i) the provision to repurchase the Time-Based Options at cost upon resignation of the employee was removed and (ii) the Return-Target Options were modified to include vesting upon a sale of shares by Vista following the IPO resulting in Vista realizing a cash return on its investment in the Company equaling or exceeding $1.17 billion. As a result of the modification to the Time-Based Options, the awards became subject to the guidance in ASC 718, Compensation - Stock Compensation . As the return multiple and vesting conditions associated with the Return-Target Options were also modified, the Company fair valued the Return-Target Options using a Monte Carlo simulation model. The Return-Target Options become exercisable following both (i) a registration of shares of common stock held by Vista and (ii) Vista realizing a cash return on its investment in the Company equaling or exceeding $1.17 billion. Vesting of the Time-Based Options accelerates when the Return-Target Options vest and therefore, recognition of the remaining unamortized stock compensation expense related to the Time-Based Options will accelerate when the Return-Target Options vest. The total number of Time-Based Options and Return-Target Options outstanding under the Amended and Restated 2018 Plan as of September 30, 2024 were 2,251,431 and 1,342,092, respectively. The Company does not expect to issue any additional awards under the Amended and Restated 2018 Plan. 2021 Omnibus Incentive Plan (“2021 Plan”) On June 29, 2021, the Company adopted the 2021 Plan to incentivize execu tive officers, management, employees, consultants and directors of the Company and to align the interests of the participants with those of the Company’s share holders. As of September 30, 2024, there were 43,059,189 shares reserved for issuance under the 2021 Plan. The total number of shares reserved for issuance under the 2021 Plan is increased on January 1 of each of the first 10 calendar years during the term of the 2021 Plan, by the lesser of (i) 5% of the total number of shares of common stock outstanding on each December 31 st immediately prior to the date of increase or (ii) such number of shares of common stock determined by our Board or compensation committee. As of September 30, 2024, there were 1,147,846 total options outstanding under the 2021 Plan, consisting of 764,908 Time-Based Options and 382,938 Return-Target Options. The vesting conditions for the options issued under the 2021 Plan are identical to those described under the Amended and Restated 2018 Plan. Stock option activity for the nine months ended September 30, 2024 is as follows: Time-Based Options Stock options Weighted Weighted average Aggregate Outstanding at December 31, 2023 3,060,388 $ 7.70 5.70 $ 23,251 Canceled or forfeited — — — — Exercised (44,049) 7.10 — — Outstanding at September 30, 2024 3,016,339 $ 7.70 4.94 $ 14,870 Vested and expected to vest at September 30, 2024 3,016,339 $ 7.70 4.94 $ 14,870 Exercisable as of September 30, 2024 2,863,841 $ 7.19 4.84 $ 14,849 Return-Target Options Stock options Weighted Weighted average Aggregate Outstanding at December 31, 2023 1,725,030 $ 7.47 5.78 $ 13,318 Canceled or forfeited — — — — Exercised — — — — Outstanding at September 30, 2024 1,725,030 $ 7.47 5.03 $ 8,514 Vested and expected to vest at September 30, 2024 1,725,030 $ 7.47 5.03 $ 8,514 Exercisable as of September 30, 2024 — $ — — $ — Restricted Stock Units ("RSUs") RSUs under the 2021 Plan granted prior to May 2022 vest 25% each year and become fully vested after four years of service. RSUs under the 2021 Plan granted during or after May 2022 vest 6.25% at the end of each successive quarter and become fully vested after four years of service. RSU activity for the nine months ended September 30, 2024 is as follows: RSUs Number of Shares Weighted Average Grant Date Fair Value Outstanding at December 31, 2023 9,014,435 $ 12.41 Granted 4,599,570 10.31 Canceled or forfeited (1,400,542) 11.42 Vested (2,406,842) 12.30 Outstanding as of September 30, 2024 9,806,621 $ 11.60 Expected to vest as of September 30, 2024 9,806,621 Market Stock Units ("MSUs") The Company granted MSUs under the 2021 Plan to certain executive officers. MSUs vest over four years, 25% on the first anniversary of the vesting commencement date and 6.25% at the end of each quarter thereafter. The number of MSUs eligible to vest is based on the performance of the Company's common stock over each applicable vesting period. The number of shares eligible to vest is calculated based on a payout factor. The payout factor is calculated by dividing (i) the average closing price of the Company's stock during the ten trading days immediately preceding the applicable vesting date by (ii) the closing price of the Company's stock on the vesting commencement date. The payout factor is zero if such quotient is less than 0.60 and is capped at 2.25. Such quotient is then multiplied by the target number of MSUs granted to the relevant officer to determine the number of shares to be issued to the officer at vesting. The grant date fair value of the MSUs was determined using a Monte-Carlo simulation. The Company uses the accelerated attribution method to account for these awards. MSU activity for the nine months ended September 30, 2024 is as follows: MSUs Number of Shares Weighted Average Outstanding at December 31, 2023 1,800,486 $ 19.28 Granted 1,395,332 14.86 Canceled or forfeited (209,532) 21.05 Change in awards based on performance (118,636) 21.42 Vested (420,786) 19.39 Outstanding as of September 30, 2024 2,446,864 $ 16.60 Expected to vest as of September 30, 2024 2,446,864 2021 Employee Stock Purchase Plan The Company adopted the ESPP for the primary purpose of incentivizing employees in future periods. As of September 30, 2024, 6,161,033 shares of common stock are reserved for issuance under the ESPP. The number of shares available for issuance under the ESPP is increased on January 1 st of each calendar year, ending in and including 2031, by an amount equal to the lesser of (i) 1% of the shares outstanding on the final day of the immediately preceding calendar year and (ii) such smaller number of shares as is determined by our Board, subject to a maximum of 16,000,000 shares of our common stock for the portion of the ESPP intended to qualify as an employee stock purchase plan under Section 423 of the Internal Revenue Code. All Company employees and employees of designated subsidiaries are eligible to participate in the ESPP and may purchase shares through payroll deductions of up to 15% of their eligible compensation, subject to a maximum of $25 in any annual period for the portion of the ESPP intended to qualify as an employee purchase plan under Section 423 of the Internal Revenue Code. The ESPP provides eligible employees the opportunity to purchase shares of the Company's common stock through payroll deductions at a price equal to 85% of the fair market value of the shares on (i) the first business day of the offering period or (ii) the last business day of the offering period, whichever is lower. The ESPP is offered to employees in six-month windows, with phases beginning on February 1 and August 1 of each calendar year. For the window that ended on January 31, 2024, employees purchased 153,239 shares at a price of $12.37 per share. For the window that ended on July 31, 2024, employees purchased 172,615 shares at a price of $8.65 per share. As of September 30, 2024, 5,561,610 shares were available for future purchase under the ESPP.

Stockholders' equity

Stockholders' equity	9 Months Ended
Stockholders' equity	Sep. 30, 2024
Stockholders' Equity Note [Abstract]
Stockholders' equity	Stockholders’ equity As of September 30, 2024, our authorized common stock consists of 500,000,000 shares of common stock, par value $0.001 per share and 50,000,000 preferred stock, par value $0.001 per share. For the three months ended September 30, 2024, the Company issued 995,796 shares of common stock for vested RSUs and MSUs. For the nine months ended September 30, 2024, the Company issued 2,827,628 shares of common stock for vested RSUs and MSUs, employees exercised stock options in exchange for 44,049 shares of common stock for $313 and employees purchased 325,854 shares of common stock through the ESPP.

Commitments and contingencies

Commitments and contingencies	9 Months Ended
Commitments and contingencies	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies	Commitments and contingencies Indemnifications In its normal course of business, the Company has made certain indemnities, commitments, and guarantees under which it may be required to make payments in relation to certain transactions. Those indemnities include intellectual property indemnities to the Company’s customers, indemnities to directors and officers of the Company to the maximum extent permitted under the laws of the State of Delaware, and indemnifications related to the Company’s lease agreements. In addition, the Company’s advertiser and distribution partner agreements contain certain indemnification provisions which are generally consistent with those prevalent in the Company’s industry. The Company has not incurred any obligations under indemnification provisions historically and does not expect to incur significant obligations in the future. Accordingly, the Company has not recorded any liability for these indemnities, commitments, and guarantees in the accompanying balance sheets. Purchase commitments In the ordinary course of business, the Company enters into various purchase commitments primarily related to third-party cloud hosting and data services, and information technology operations. Total non-cancelable purchase commitments as of September 30, 2024 were approximately $125,876 for periods through 2028.

Net income (loss) per share

Net income (loss) per share	9 Months Ended
Net income (loss) per share	Sep. 30, 2024
Earnings Per Share [Abstract]
Net income (loss) per share	Net income (loss) per share Basic and diluted income (loss) per share is computed by dividing net income by the weighted-average shares outstanding: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Numerator: Net income (loss) $ 16,089 $ (13,749) $ 22,524 $ (2,926) Denominator: Basic Shares: Weighted-average shares outstanding 161,663,506 157,055,904 160,528,610 157,691,005 Diluted Shares: Basic weighted-average shares outstanding 161,663,506 157,055,904 160,528,610 157,691,005 Dilutive effect of stock-based awards 3,420,602 — 4,106,466 — Weighted-average diluted shares outstanding 165,084,108 157,055,904 164,635,076 157,691,005 Net income (loss) per share: Basic $ 0.10 $ (0.09) $ 0.14 $ (0.02) Diluted $ 0.10 $ (0.09) $ 0.14 $ (0.02) The following potential outstanding equity awards were excluded from the computation of diluted net income (loss) per share attributable to common stockholders for the periods presented given that their inclusion would have been anti-dilutive. Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Options to purchase common stock 1,175,071 5,267,371 1,187,222 5,792,252 Restricted stock units 544,113 9,328,583 3,309,333 9,231,891 Market stock units 4,447,652 1,822,258 1,630,057 1,799,804 ESPP — 202,951 — 45,348 Total 6,166,836 16,621,163 6,126,612 16,869,295

Fair value disclosures

Fair value disclosures	9 Months Ended
Fair value disclosures	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair value disclosures	Fair value disclosures Assets and liabilities measured at fair value on a recurring basis The Company invests in money market funds, which are measured and recorded at fair value on a recurring basis at each reporting period. Money market funds are valued based on quoted market prices in active markets and classified within Level 1 of the fair value hierarchy. The following table summarizes our cash equivalents measured at fair value on a recurring basis: Fair value hierarchy Fair value Money market funds September 30, 2024 Level 1 $ 15,867 December 31, 2023 Level 1 $ 15,331 The carrying value of cash and cash equivalents, restricted cash, accounts receivable and accounts payable approximated fair value due to their short maturities. Financial instruments

Related-party transactions

Related-party transactions	9 Months Ended
Related-party transactions	Sep. 30, 2024
Related Party Transactions [Abstract]
Related-party transactions	Related-party transactions The Company incurs expenses for consulting services and other expenses related to services provided by Vista Consulting Group, LLC (“VCG”). For the three months ended September 30, 2024 and 2023, the Company incurred expenses of $4 and $0, respectively. For the nine months ended September 30, 2024 and 2023, the Company incurred expenses of $4 and $0, respectively. These costs were included in general and administrative expenses in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). Amounts due to VCG as of September 30, 2024 and December 31, 2023 were $0 in both periods. The Company incurs various travel and other expenses related to services provided by Vista Equity Partners Management, LLC (“VEP”). For the three months ended September 30, 2024 and 2023, the Company incurred expenses of $2 and $21, respectively. For the nine months ended September 30, 2024 and 2023, the Company incurred expenses of $20 and $64, respectively. These costs were included in general and administrative expenses in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). Amounts due to VEP as of September 30, 2024 and December 31, 2023 were $0 and $30, respectively. In May 2023, funds affiliated with Vista conducted an underwritten secondary offering of 11,500,000 shares of the Company’s common stock. In June 2023, funds affiliated with Vista sold 5,220,000 shares of the Company’s common stock in a block trade in compliance with Rule 144 of the Securities Act of 1933, as amended (the “Securities Act”). The Company did not receive any proceeds from these sales, but bore the costs associated with therewith (other than underwriting discounts and commissions), which were $1,404 and were recorded within General and administrative expenses in the Condensed Consolidated Statement of Operations and Comprehensive Loss for the nine months ended September 30, 2023. The Company had other related party transactions with companies owned by Vista Equity Partners that are immaterial individually and in aggregate to the Condensed Consolidated Balance Sheets and Condensed Consolidated Statements of Operations and Comprehensive Income (Loss).

Restructuring

Restructuring	9 Months Ended
Restructuring	Sep. 30, 2024
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring On December 7, 2022, the Company announced a reduction in workforce of approximately 120 employees to better align resources, consistent with the Company’s strategy of increasing operational efficiency and improving productivity. There was no remaining liability as of December 31, 2023, and therefore, no activity during the quarter ended September 30, 2024. Activity for the nine months ended September 30, 2023, was as follows: Balance at December 31, 2022 $ 4,315 Restructuring reserve increase 69 Payments and impact of FX (4,112) Balance at September 30, 2023 $ 272

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net income (loss)	$ 16,089	$ (13,749)	$ 22,524	$ (2,926)

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of presentation and sum_2

Basis of presentation and summary of significant accounting policies (Policies)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation The Company’s condensed consolidated financial statements are presented in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and reflect the financial position, results of operations and cash flows for all periods presented. The year-end condensed balance sheet data was derived from audited financial statements but does not include all disclosures required by U.S. GAAP. The accompanying interim Condensed Consolidated Balance Sheets as of September 30, 2024, the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss), of Cash Flows and of Changes in Stockholders’ Equity for the three and nine months ended September 30, 2024 and 2023, and the related footnote disclosures are unaudited. These unaudited interim condensed consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements and, in management’s opinion, include all adjustments necessary to state fairly the consolidated financial position of the Company. All adjustments made were of a normal recurring nature. The results for the three and nine months ended September 30, 2024 are not necessarily indicative of the results to be expected for the year ending December 31, 2024, or for any future period.
Basis of consolidation	Basis of consolidation The condensed consolidated financial statements include the accounts of Integral Ad Science Holding Corp. and its wholly-owned subsidiaries. All material intercompany accounts and transactions have been eliminated in consolidation.
Use of estimates	Use of estimatesThe preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates. Significant estimates include the estimated useful lives of intangible assets and internal use software, the allowance for credit losses, goodwill impairment testing, assumptions used to calculate equity-based compensation, and the realization of deferred tax assets. The Company bases its estimates on past experience, market conditions, and other assumptions that the Company believes are reasonable under the circumstances, and the Company evaluates these estimates on an ongoing basis. Actual results may differ from these estimates due to risks and uncertainties, including the continued uncertainty surrounding the stability of economic conditions due to high inflation, changes to fiscal and monetary policy, high interest rates, currency fluctuations, fluctuations in the financial markets and disruptions in European economies as a result of the war in Ukraine and other geopolitical issues.
Foreign currency	Foreign currencyThe reporting currency of the Company is the U.S. dollar. The functional currency of our foreign subsidiaries is the currency of the primary economic environment in which they operate, which is their local currency. The financial statements of these subsidiaries are translated into U.S. dollars using month-end rates of exchange for assets and liabilities, and average rates of exchange for revenue, costs and expenses. Translation gains and losses are recorded in accumulated other comprehensive loss within stockholders’ equity. Transaction gains and losses including those on intercompany transactions denominated in a currency other than the functional currency of the entity involved are included in foreign exchange (gain) loss, net in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss).
Cash, cash equivalents, and restricted cash	Cash, cash equivalents, and restricted cash Cash equivalents include money market accounts and other highly liquid investments with an original maturity date of three months or less at the time of purchase. Cash amounts with restrictions are classified as restricted cash within the Condensed Consolidated Balance Sheets.
Accounts receivable, net	Accounts receivable, net Accounts receivable are carried at the original invoiced amount less an allowance for credit losses. The allowance is estimated by pooling accounts receivables based on similar risk characteristics, and expected credit loss exposure is evaluated for each accounts receivable pool. Invoices are typically issued with net 30-days to net 90-days terms. Account balances are considered delinquent if payment is not received by the due date, and the receivables are written off when deemed uncollectible. These costs are recorded in general and administrative expenses within the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss).
Stock-based compensation	Stock-based compensation Stock-based compensation is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period, which is generally the vesting period. The Company accounts for forfeitures as they occur. The Company used the following assumptions in valuing its market stock units ("MSUs"), shares granted under the Company's 2021 Employee Stock Purchase Program ("ESPP"), time-based service options, which vest over a period of time subject to continued employment ("Time-Based Options"), and return-target options ("Return-Target Options"), which vest upon a realized cash return of the equity investment of funds affiliated with Vista Equity Partners ("Vista"), the Company’s largest shareholder. Expected term — For time-based awards, the estimated expected term of options granted is generally calculated as the vesting period plus the midpoint of the remaining contractual term, as the Company does not have sufficient historical information to develop reasonable expectations surrounding future exercise patterns and post-vesting employment termination behavior. For awards subject to market and performance conditions, the expected term represents the period of time that the options granted are expected to be outstanding. Expected volatility — Volatility is estimated based upon observed option-implied volatilities for the Company in addition to a group of peer companies. The Company believes this is the best estimate of the expected volatility over the weighted-average expected term of its option grants. Risk-free interest rate — The risk-free interest rate is based on the implied yield currently available on U.S. Treasury instruments with terms approximately equal to the expected term of the option. Expected dividend — The expected dividend assumption was based on the Company’s history and expectation of dividend payouts. The Company currently has no history or expectation of paying cash dividends on its common stock. Fair value — Following the pricing of the Initial Public Offering, the Company’s shares have traded publicly, and accordingly the Company uses the applicable closing price of its common stock to determine fair value.
Accounting pronouncements not yet adopted	(h) Accounting pronouncements not yet adopted On November 27, 2023, the FASB issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures," which requires incremental disclosures related to an entity's reportable segments. This ASU is effective for annual periods beginning after December 15, 2023. The Company does not expect the adoption of ASU 2023-07 to have a material impact on its consolidated financial statements. On December 14, 2023, the FASB issued ASU 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures," which requires companies to disclose more detailed information in their reconciliation of their statutory tax rate to their effective tax rate. The ASU also requires entities to disclosure more detailed information about income taxes paid, including by jurisdiction, pretax income (or loss) from continuing operations and income tax expense (or benefit). This ASU is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2024. The Company is currently evaluating the impact of the adoption of ASU No. 2023-09 on its consolidated financial statements.

Basis of presentation and sum_3

Basis of presentation and summary of significant accounting policies (Tables)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Schedule of Cash and Cash Equivalents	The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheets to the amounts shown in the Condensed Consolidated Statements of Cash Flows. September 30, 2024 December 31, 2023 Cash and cash equivalents $ 57,085 $ 124,759 Short-term restricted cash 170 54 Long-term restricted cash (held in other long-term assets) 2,352 2,477 Total cash, cash equivalents, and restricted cash shown in the Condensed Consolidated Statements of Cash Flows $ 59,607 $ 127,290
Schedule of Restricted Cash	The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheets to the amounts shown in the Condensed Consolidated Statements of Cash Flows. September 30, 2024 December 31, 2023 Cash and cash equivalents $ 57,085 $ 124,759 Short-term restricted cash 170 54 Long-term restricted cash (held in other long-term assets) 2,352 2,477 Total cash, cash equivalents, and restricted cash shown in the Condensed Consolidated Statements of Cash Flows $ 59,607 $ 127,290
Schedule of Allowance for Credit Losses	The activity in our allowance for credit losses consists of the following as of: September 30, 2024 September 30, 2023 Balance, beginning of period $ 8,645 $ 6,691 Additional provision 949 2,223 Receivables written off and impact of exchange rates (278) (406) Adoption of ASC 326 — (1,271) Balance, end of period $ 9,316 $ 7,237
Schedule of Valuation Assumptions of Stock Options	The Company used the following assumptions in valuing its stock-based compensation: September 30, 2024 September 30, 2023 Estimated fair value $3.19 - $14.86 $3.35 - $38.36 Expected volatility (%) 50% - 66% 50% - 65% Expected term (in years) 0.50 - 4.00 0.26 - 4.00 Risk-free interest rate (%) 4.26% - 5.15% 3.63% - 5.55% Dividend yield — —

Property and equipment, net (Ta

Property and equipment, net (Tables)	9 Months Ended
Property and equipment, net (Tables)	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment	Property and equipment consisted of the following: Estimated September 30, 2024 December 31, 2023 Computer and office equipment 1 - 3 years $ 4,985 $ 4,070 Computer software 3 - 5 years 218 218 Leasehold improvements Various 2,944 2,535 Furniture 5 years 610 585 Total property and equipment 8,757 7,408 Less: accumulated depreciation (4,680) (3,639) Total property and equipment, net $ 4,077 $ 3,769

Internal use software, net (Tab

Internal use software, net (Tables)	9 Months Ended
Internal use software, net (Tables)	Sep. 30, 2024
Internal Use Software [Abstract]
Schedule of Internal Use Software, Net	Internal use software consisted of the following: Estimated September 30, 2024 December 31, 2023 Internal use software 3 - 5 years $ 98,831 $ 69,797 Less: asset impairments (37) (33) Less: accumulated amortization (47,248) (29,463) Total internal use software, net $ 51,546 $ 40,301

Intangible assets, net (Tables)

Intangible assets, net (Tables)	9 Months Ended
Intangible assets, net (Tables)	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Gross Book Value, Accumulated Amortization, Net Book Value and Amortization Periods of Intangible Assets	The gross book value, accumulated amortization, net book value and amortization periods of the intangible assets were as follows: September 30, 2024 Estimated Gross book Accumulated Net book value Weighted Customer relationships 5 - 15 years $ 302,003 $ (163,960) $ 138,043 7.9 years Developed technology 5 years 137,414 (130,050) 7,364 2.0 years Trademarks 5 - 9 years 19,700 (14,489) 5,211 2.6 years Total $ 459,117 $ (308,499) $ 150,618 December 31, 2023 Estimated Gross book Accumulated Net book value Weighted Customer relationships 5 - 15 years $ 301,994 $ (142,135) $ 159,859 8.6 years Developed technology 5 years 137,361 (125,426) 11,935 2.6 years Trademarks 5 - 9 years 19,700 (12,604) 7,096 3.4 years Favorable leases 6 years 198 (180) 18 0.5 years Total $ 459,253 $ (280,345) $ 178,908

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
Goodwill (Tables)	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Goodwill	The following table provides a roll forward of the changes in the goodwill balance: Goodwill as of December 31, 2023 $ 675,282 Impact of exchange rates 256 Goodwill as of September 30, 2024 $ 675,538

Accounts payable and accrued _2

Accounts payable and accrued expenses and other long-term liabilities (Tables)	9 Months Ended
	Sep. 30, 2024
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Expenses	Accounts payable and accrued expenses consisted of the following: September 30, 2024 December 31, 2023 Accounts payable $ 3,837 $ 12,092 Accrued payroll 5,439 9,250 Accrued professional fees 2,538 3,281 Accrued bonuses and commissions 17,079 20,413 Accrued revenue sharing 4,663 4,136 Taxes payable 2,736 6,436 Accrued hosting fees 4,895 9,475 Other accrued expenses 7,687 7,149 Total accounts payable and accrued expenses $ 48,874 $ 72,232
Schedule of Other Long-Term Liabilities	Other long-term liabilities consisted of the following: September 30, 2024 December 31, 2023 Security deposit received $ 672 $ 672 Uncertain tax positions 5,514 5,511 Total other long-term liabilities $ 6,186 $ 6,183

Long-term debt (Tables)

Long-term debt (Tables)	9 Months Ended
Long-term debt (Tables)	Sep. 30, 2024
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	As of September 30, 2024, the Company was in compliance with all covenants contained in the Credit Agreement. September 30, 2024 December 31, 2023 Revolver $ 65,000 $ 155,000 Less: unamortized debt issuance costs (927) (1,275) Total carrying amount $ 64,073 $ 153,725
Schedule of Future Principal Payments of Long-term Debt	Future principal payments of long-term debt as of September 30, 2024 are as follows: Year Ending 2024 $ — 2025 — 2026 65,000 $ 65,000

Segment data (Tables)

Segment data (Tables)	9 Months Ended
Segment data (Tables)	Sep. 30, 2024
Segment Reporting [Abstract]
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	The following table summarizes revenue by geographic area: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 North and South America (“Americas”) $ 92,681 $ 83,419 $ 260,074 $ 236,610 Europe, Middle East and Africa (“EMEA”) 31,492 27,649 89,524 78,201 Asia and Pacific Rim (“APAC”) 9,355 9,263 27,465 25,263 Total revenue $ 133,528 $ 120,331 $ 377,063 $ 340,074 The following table summarizes long lived assets, net by geographic area: September 30, 2024 December 31, 2023 Americas $ 11,615 $ 13,848 EMEA 8,250 8,577 APAC 4,684 3,012 Total long-lived assets $ 24,549 $ 25,437

Stock-based compensation (Table

Stock-based compensation (Tables)	9 Months Ended
Stock-based compensation (Tables)	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Stock-Based Compensation Expense	Total stock-based compensation expense for all equity arrang ements for the three and nine months e nded September 30, 2024 and 2023 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Cost of revenue $ 80 $ 118 $ 286 $ 328 Sales and marketing 4,829 5,714 14,002 17,859 Technology and development 4,941 2,902 14,139 13,434 General and administrative 6,593 5,166 18,758 34,020 Total $ 16,443 $ 13,900 $ 47,185 $ 65,641 The Company maintains multiple stock-based incentive compensation plans. Expense relating to outstanding awards under such plans is summarized as follows: Three Months Ended September 30, Nine Months Ended September 30, Unamortized Expense as of Weighted 2024 2023 2024 2023 September 30, 2024 Time-Based Options 2018 Plan $ 111 $ 1,727 $ 747 $ 3,544 2021 Plan 536 536 1,605 1,740 Total Time-Based Options expense $ 647 $ 2,263 $ 2,352 $ 5,284 $ 1,641 0.7 years Return-Target Options 2018 Plan $ — $ (2,111) $ — $ 18,215 2021 Plan — — — 3,124 Total Return-Target Options expense $ — $ (2,111) $ — $ 21,339 $ — 0.0 years LTIP expense (2018 Plan) $ — $ 16 $ — $ 333 Other equity awards under 2021 Plan Restricted Stock Units ("RSUs") $ 10,444 $ 8,760 $ 30,529 $ 25,483 $ 103,107 2.8 years Market Stock Units ("MSUs") 4,976 4,632 13,000 12,194 22,270 3.2 years Other equity awards under 2021 Plan expense $ 15,420 $ 13,392 $ 43,529 $ 37,677 $ 125,377 Employee Stock Purchase Plan "ESPP" $ 376 $ 340 $ 1,304 $ 1,008 Total Stock-Based Compensation expense $ 16,443 $ 13,900 $ 47,185 $ 65,641 $ 127,018
Schedule of Stock Option Activity	Stock option activity for the nine months ended September 30, 2024 is as follows: Time-Based Options Stock options Weighted Weighted average Aggregate Outstanding at December 31, 2023 3,060,388 $ 7.70 5.70 $ 23,251 Canceled or forfeited — — — — Exercised (44,049) 7.10 — — Outstanding at September 30, 2024 3,016,339 $ 7.70 4.94 $ 14,870 Vested and expected to vest at September 30, 2024 3,016,339 $ 7.70 4.94 $ 14,870 Exercisable as of September 30, 2024 2,863,841 $ 7.19 4.84 $ 14,849 Return-Target Options Stock options Weighted Weighted average Aggregate Outstanding at December 31, 2023 1,725,030 $ 7.47 5.78 $ 13,318 Canceled or forfeited — — — — Exercised — — — — Outstanding at September 30, 2024 1,725,030 $ 7.47 5.03 $ 8,514 Vested and expected to vest at September 30, 2024 1,725,030 $ 7.47 5.03 $ 8,514 Exercisable as of September 30, 2024 — $ — — $ —
Schedule of Restricted Stock Unit Activity	RSU activity for the nine months ended September 30, 2024 is as follows: RSUs Number of Shares Weighted Average Grant Date Fair Value Outstanding at December 31, 2023 9,014,435 $ 12.41 Granted 4,599,570 10.31 Canceled or forfeited (1,400,542) 11.42 Vested (2,406,842) 12.30 Outstanding as of September 30, 2024 9,806,621 $ 11.60 Expected to vest as of September 30, 2024 9,806,621
Schedule of Market Stock Unit Activity	MSU activity for the nine months ended September 30, 2024 is as follows: MSUs Number of Shares Weighted Average Outstanding at December 31, 2023 1,800,486 $ 19.28 Granted 1,395,332 14.86 Canceled or forfeited (209,532) 21.05 Change in awards based on performance (118,636) 21.42 Vested (420,786) 19.39 Outstanding as of September 30, 2024 2,446,864 $ 16.60 Expected to vest as of September 30, 2024 2,446,864

Net income (loss) per share (Ta

Net income (loss) per share (Tables)	9 Months Ended
Net income (loss) per share (Tables)	Sep. 30, 2024
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Basic and diluted income (loss) per share is computed by dividing net income by the weighted-average shares outstanding: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Numerator: Net income (loss) $ 16,089 $ (13,749) $ 22,524 $ (2,926) Denominator: Basic Shares: Weighted-average shares outstanding 161,663,506 157,055,904 160,528,610 157,691,005 Diluted Shares: Basic weighted-average shares outstanding 161,663,506 157,055,904 160,528,610 157,691,005 Dilutive effect of stock-based awards 3,420,602 — 4,106,466 — Weighted-average diluted shares outstanding 165,084,108 157,055,904 164,635,076 157,691,005 Net income (loss) per share: Basic $ 0.10 $ (0.09) $ 0.14 $ (0.02) Diluted $ 0.10 $ (0.09) $ 0.14 $ (0.02)
Schedule of Antidilutive Securities Excluded From Computation of Earnings Per Share	The following potential outstanding equity awards were excluded from the computation of diluted net income (loss) per share attributable to common stockholders for the periods presented given that their inclusion would have been anti-dilutive. Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Options to purchase common stock 1,175,071 5,267,371 1,187,222 5,792,252 Restricted stock units 544,113 9,328,583 3,309,333 9,231,891 Market stock units 4,447,652 1,822,258 1,630,057 1,799,804 ESPP — 202,951 — 45,348 Total 6,166,836 16,621,163 6,126,612 16,869,295

Fair value disclosures (Tables)

Fair value disclosures (Tables)	9 Months Ended
Fair value disclosures (Tables)	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Cash Equivalents Measured at Fair Value on a Recurring Basis	The following table summarizes our cash equivalents measured at fair value on a recurring basis: Fair value hierarchy Fair value Money market funds September 30, 2024 Level 1 $ 15,867 December 31, 2023 Level 1 $ 15,331

Restructuring (Tables)

Restructuring (Tables)	9 Months Ended
Restructuring (Tables)	Sep. 30, 2024
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Reserve Activity	Activity for the nine months ended September 30, 2023, was as follows: Balance at December 31, 2022 $ 4,315 Restructuring reserve increase 69 Payments and impact of FX (4,112) Balance at September 30, 2023 $ 272

Basis of presentation and sum_4

Basis of presentation and summary of significant accounting policies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liabilities arising from right of use assets			$ 6,110	$ 4,832
Unrealized foreign exchange gains (losses)	$ 3,339	$ (1,810)	1,775	(571)
Realized transaction gains (losses)	(732)	(268)	(1,052)	(360)
Interest income	$ 661	$ 646	$ 2,342	1,926
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liabilities arising from right of use assets				$ 29,300

Basis of presentation and sum_5

Basis of presentation and summary of significant accounting policies -Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Cash and cash equivalents	$ 57,085	$ 124,759
Short-term restricted cash	170	54
Long-term restricted cash (held in other long-term assets)	2,352	2,477
Total cash, cash equivalents, and restricted cash shown in the Condensed Consolidated Statements of Cash Flows	$ 59,607	$ 127,290	$ 94,786	$ 89,671

Basis of presentation and sum_6

Basis of presentation and summary of significant accounting policies -Schedule of Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 8,645	$ 6,691
Additional provision	949	2,223
Receivables written off and impact of exchange rates	(278)	(406)
Balance, end of period	9,316	7,237
Cumulative Effect, Period of Adoption, Adjustment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 0	$ (1,271)

Basis of presentation and sum_7

Basis of presentation and summary of significant accounting policies - Schedule of Valuation Assumptions of Stock Options (Details) - $ / shares	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility (%), minimum	50%	50%
Expected volatility (%), maximum	66%	65%
Risk-free interest rate (%), minimum	4.26%	3.63%
Risk-free interest rate (%), maximum	5.15%	5.55%
Dividend yield	0%	0%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value (in dollars per share)	$ 3.19	$ 3.35
Expected term (in years)	6 months	3 months 3 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value (in dollars per share)	$ 14.86	$ 38.36
Expected term (in years)	4 years	4 years

Property and equipment, net - S

Property and equipment, net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 8,757	$ 7,408
Less: accumulated depreciation	(4,680)	(3,639)
Total property and equipment, net	4,077	3,769
Computer and office equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	4,985	4,070
Computer software
Property, Plant and Equipment [Line Items]
Total property and equipment	218	218
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 2,944	2,535
Furniture
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	5 years
Total property and equipment	$ 610	$ 585
Minimum \| Computer and office equipment
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	1 year
Minimum \| Computer software
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years
Maximum \| Computer and office equipment
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years
Maximum \| Computer software
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	5 years

Property and equipment, net - N

Property and equipment, net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 347	$ 287	$ 990	$ 772

Internal use software, net - Sc

Internal use software, net - Schedule of Internal Use Software, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Internal Use Software [Line Items]
Internal use software	$ 98,831	$ 69,797
Less: asset impairments	(37)	(33)
Less: accumulated amortization	(47,248)	(29,463)
Total internal use software, net	$ 51,546	$ 40,301
Minimum
Internal Use Software [Line Items]
Estimated useful life (in years)	3 years
Maximum
Internal Use Software [Line Items]
Estimated useful life (in years)	5 years

Internal use software, net - Na

Internal use software, net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Internal Use Software [Abstract]
Amortization expense	$ 6,565	$ 4,032	$ 17,747	$ 10,477
Write-off of costs related to projects that are no longer being implemented			$ 37

Intangible assets, net - Schedu

Intangible assets, net - Schedule of Gross Book Value, Accumulated Amortization, Net Book Value and Amortization Periods of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross book value	$ 459,117	$ 459,253
Accumulated amortization	(308,499)	(280,345)
Net book value	150,618	178,908
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross book value	302,003	301,994
Accumulated amortization	(163,960)	(142,135)
Net book value	$ 138,043	$ 159,859
Weighted average remaining useful life	7 years 10 months 24 days	8 years 7 months 6 days
Developed technology
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years	5 years
Gross book value	$ 137,414	$ 137,361
Accumulated amortization	(130,050)	(125,426)
Net book value	$ 7,364	$ 11,935
Weighted average remaining useful life	2 years	2 years 7 months 6 days
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross book value	$ 19,700	$ 19,700
Accumulated amortization	(14,489)	(12,604)
Net book value	$ 5,211	$ 7,096
Weighted average remaining useful life	2 years 7 months 6 days	3 years 4 months 24 days
Favorable leases
Finite-Lived Intangible Assets [Line Items]
Estimated useful life		6 years
Gross book value		$ 198
Accumulated amortization		(180)
Net book value		$ 18
Weighted average remaining useful life		6 months
Minimum \| Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years	5 years
Minimum \| Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years	5 years
Maximum \| Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	15 years	15 years
Maximum \| Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	9 years	9 years

Intangible assets, net - Narrat

Intangible assets, net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 9,331	$ 9,708	$ 28,295	$ 29,124
Favorable leases
Finite-Lived Intangible Assets [Line Items]
Write-off of fully amortized intangible assets			$ 198

Goodwill (Details)

Goodwill (Details) $ in Thousands	9 Months Ended
Goodwill (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Goodwill [Roll Forward]
Goodwill at beginning of period	$ 675,282
Impact of exchange rates	256
Goodwill at end of period	$ 675,538

Accounts payable and accrued _3

Accounts payable and accrued expenses and other long-term liabilities - Schedule of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Accounts payable	$ 3,837	$ 12,092
Accrued payroll	5,439	9,250
Accrued professional fees	2,538	3,281
Accrued bonuses and commissions	17,079	20,413
Accrued revenue sharing	4,663	4,136
Taxes payable	2,736	6,436
Accrued hosting fees	4,895	9,475
Other accrued expenses	7,687	7,149
Total accounts payable and accrued expenses	$ 48,874	$ 72,232

Accounts payable and accrued _4

Accounts payable and accrued expenses and other long-term liabilities - Schedule of Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Security deposit received	$ 672	$ 672
Uncertain tax positions	5,514	5,511
Total other long-term liabilities	$ 6,186	$ 6,183

Long-term debt - Narrative (Det

Long-term debt - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 29, 2021	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Amortization of debt issuance costs		$ 116	$ 116	$ 348	$ 348
Interest expense, debt		$ 1,870	$ 3,639	6,781	$ 11,326
Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300,000
Repayments of long-term lines of credit				$ 90,000
Debt costs	$ 2,318
Effective interest rate on debt		6.90%		6.90%
Maximum net leverage ratio		3.50		3.50
Minimum interest coverage ratio		2.50		2.50
Credit Agreement \| Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Commitment fee rate	0.20%
Credit Agreement \| Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Commitment fee rate	0.35%
Credit Agreement \| Revolving Credit Facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.75%
Credit Agreement \| Revolving Credit Facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Credit Agreement \| Revolving Credit Facility \| SOFR \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Credit Agreement \| Revolving Credit Facility \| SOFR \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
Credit Agreement \| Revolving Credit Facility \| Sterling \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.7826%
Credit Agreement \| Revolving Credit Facility \| Sterling \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.5326%
Credit Agreement \| Revolving Credit Facility \| Eurodollar \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.7956%
Credit Agreement \| Revolving Credit Facility \| Eurodollar \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.5456%
Credit Agreement \| Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 30,000
Credit Agreement \| Alternative Currency
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	100,000
Credit Agreement \| Term Loan
Debt Instrument [Line Items]
Incremental increases in maximum borrowing capacity	$ 5,000

Long-term debt - Schedule of Lo

Long-term debt - Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Less: unamortized debt issuance costs	$ (927)	$ (1,275)
Total carrying amount	64,073	153,725
Revolving Credit Facility
Debt Instrument [Line Items]
Revolver	$ 65,000	$ 155,000

Long-term debt - Schedule of Fu

Long-term debt - Schedule of Future Principal Payments of Long-term Debt (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Maturities of Long-term Debt [Abstract]
2024	$ 0
2025	0
2026	65,000
Long-term debt	$ 65,000

Income taxes (Details)

Income taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Income taxes (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ 2,773	$ 19,841	$ 7,562	$ (6,240)
Effective tax rate	14.70%	325.70%	25.10%	68.10%

Segment data - Narrative (Detai

Segment data - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
Segment data - Narrative (Details) $ in Thousands	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments \| segment			1
Revenue	$ 133,528	$ 120,331	$ 377,063	$ 340,074
United States
Segment Reporting Information [Line Items]
Revenue	$ 87,689	$ 78,777	$ 246,471	$ 224,743

Segment data - Schedule of Reve

Segment data - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 133,528	$ 120,331	$ 377,063	$ 340,074
Total long-lived assets	24,549		24,549		$ 25,437
North and South America (“Americas”)
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	92,681	83,419	260,074	236,610
Total long-lived assets	11,615		11,615		13,848
Europe, Middle East and Africa (“EMEA”)
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	31,492	27,649	89,524	78,201
Total long-lived assets	8,250		8,250		8,577
Asia and Pacific Rim (“APAC”)
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	9,355	$ 9,263	27,465	$ 25,263
Total long-lived assets	$ 4,684		$ 4,684		$ 3,012

Stock-based compensation - Sche

Stock-based compensation - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 16,443	$ 13,900		$ 47,185	$ 65,641
Unamortized expense	127,018			127,018
2021 Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	15,420	13,392		43,529	37,677
Unamortized expense	125,377			125,377
Time-Based Options
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	647	2,263		2,352	5,284
Unamortized expense	1,641			$ 1,641
Weighted Average Vesting Term				8 months 12 days
Time-Based Options \| 2018 Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	111	1,727		$ 747	3,544
Time-Based Options \| 2021 Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	536	536		1,605	1,740
Return-Target Options
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	0	(2,111)	$ 23,450	0	21,339
Unamortized expense	0			$ 0
Weighted Average Vesting Term				0 years
Return-Target Options \| 2018 Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	0	(2,111)		$ 0	18,215
Return-Target Options \| 2021 Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	0	0		0	3,124
LTIP \| 2018 Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	0	16		0	333
Restricted stock units \| 2021 Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	10,444	8,760		30,529	25,483
Unamortized expense	103,107			$ 103,107
Weighted Average Vesting Term				2 years 9 months 18 days
Market stock units \| 2021 Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	4,976	4,632		$ 13,000	12,194
Unamortized expense	22,270			$ 22,270
Weighted Average Vesting Term				3 years 2 months 12 days
ESPP
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	376	340		$ 1,304	1,008
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	80	118		286	328
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	4,829	5,714		14,002	17,859
Technology and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	4,941	2,902		14,139	13,434
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 6,593	$ 5,166		$ 18,758	$ 34,020

Stock-based compensation - Narr

Stock-based compensation - Narrative (Details) $ / shares in Units, $ in Thousands			3 Months Ended			4 Months Ended	6 Months Ended		9 Months Ended		29 Months Ended
	Jun. 29, 2021	Aug. 01, 2018 USD ($)	Sep. 30, 2024 USD ($) shares	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Apr. 30, 2022	Jul. 31, 2024 $ / shares shares	Jan. 31, 2024 $ / shares shares	Sep. 30, 2024 USD ($) day shares	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) shares	Dec. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $			$ 16,443	$ 13,900					$ 47,185	$ 65,641
2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $			15,420	13,392					43,529	37,677
Time-Based Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $			$ 647	2,263					$ 2,352	5,284
Stock options outstanding (in shares) \| shares			3,016,339						3,016,339		3,016,339	3,060,388
Time-Based Options \| 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
Stock-based compensation expense \| $			$ 111	1,727					$ 747	3,544
Time-Based Options \| 2018 Plan \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		12 months
Award vesting rate		25%
Time-Based Options \| 2018 Plan \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rate		6.25%
Time-Based Options \| Amended and Restated 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares) \| shares			2,251,431						2,251,431		2,251,431
Time-Based Options \| 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $			$ 536	536					$ 1,605	1,740
Stock options outstanding (in shares) \| shares			764,908						764,908		764,908
Return-Target Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $			$ 0	(2,111)	$ 23,450				$ 0	21,339
Stock options outstanding (in shares) \| shares			1,725,030						1,725,030		1,725,030	1,725,030
Return-Target Options \| 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum equity return multiple		3
Stock-based compensation expense \| $			$ 0	(2,111)					$ 0	18,215
Return-Target Options \| Amended and Restated 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, vesting upon sale of share resulting in cash return, threshold \| $		$ 1,170,000
Stock options outstanding (in shares) \| shares			1,342,092						1,342,092		1,342,092
Return-Target Options \| 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $			$ 0	0					$ 0	3,124
Stock options outstanding (in shares) \| shares			382,938						382,938		382,938
Stock Options \| 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares) \| shares			1,147,846						1,147,846		1,147,846
Stock authorized for awards (in shares) \| shares			43,059,189						43,059,189		43,059,189
Period of increase in stock reserved for future issuance	10 years
Increase in stock reserved for future issuance, percentage of common stock outstanding	5%
Restricted stock units \| 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						4 years					4 years
Award vesting rate						25%					6.25%
Stock-based compensation expense \| $			$ 10,444	8,760					$ 30,529	25,483
Market stock units \| 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period									4 years
Stock-based compensation expense \| $			$ 4,976	$ 4,632					$ 13,000	$ 12,194
Vesting eligibility, payout factor calculation, measurement period for average closing stock price, number of trading days preceding vesting date \| day									10
Vesting eligibility payout factor calculation, maximum quotient allowable for minimum payout factor (less than)									0.60
Market stock units \| 2021 Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting eligibility, payout factor									0
Market stock units \| 2021 Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting eligibility, payout factor									2.25
Market stock units \| 2021 Plan \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rate									25%
Market stock units \| 2021 Plan \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rate									6.25%
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock authorized for awards (in shares) \| shares			6,161,033						6,161,033		6,161,033
Increase in stock reserved for future issuance, percentage of common stock outstanding									1%
Increase in stock reserved for future issuance, maximum shares of common stock allotted for ESPP (in shares) \| shares			16,000,000						16,000,000		16,000,000
Maximum employee payroll deduction percentage of eligible compensation for ESPP			15%						15%		15%
Maximum annual employee payroll deductions of eligible compensation for ESPP \| $			$ 25						$ 25		$ 25
Purchase price of ESPP shares, percent									85%
Offering period									6 months
Stock issued under the ESPP (in shares) \| shares							172,615	153,239
ESPP purchase (in dollars per share) \| $ / shares							$ 8.65	$ 12.37
Shares available for future purchase under ESPP (in shares) \| shares			5,561,610						5,561,610		5,561,610

Stock-based compensation - Sc_2

Stock-based compensation - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Time-Based Options
Stock options
Beginning balance outstanding (in shares)	3,060,388
Canceled or forfeited (in shares)	0
Exercised (in shares)	(44,049)
Ending balance outstanding (in shares)	3,016,339	3,060,388
Stock options vested and expected to vest (in shares)	3,016,339
Stock options exercisable (in shares)	2,863,841
Weighted average exercise price
Beginning balance outstanding (in dollars per share)	$ 7.70
Canceled or forfeited (in dollars per share)	0
Exercise price - exercised (in dollars per share)	7.10
Ending balance outstanding (in dollars per share)	7.70	$ 7.70
Weighted average exercise price of options vested and expected to vest (in dollars per share)	7.70
Weighted average exercise price of options exercisable (in dollars per share)	$ 7.19
Weighted average remaining contractual life (years)
Weighted average remaining contractual life (years) of options outstanding	4 years 11 months 8 days	5 years 8 months 12 days
Weighted average remaining contractual life (years) of options vested and expected to vest	4 years 11 months 8 days
Weighted average remaining contractual life (years) of options exercisable	4 years 10 months 2 days
Aggregate intrinsic value
Aggregate intrinsic value of options outstanding	$ 14,870	$ 23,251
Aggregate intrinsic value of options vested and expected to vest	14,870
Aggregate intrinsic value of options exercisable	$ 14,849
Return-Target Options
Stock options
Beginning balance outstanding (in shares)	1,725,030
Canceled or forfeited (in shares)	0
Exercised (in shares)	0
Ending balance outstanding (in shares)	1,725,030	1,725,030
Stock options vested and expected to vest (in shares)	1,725,030
Stock options exercisable (in shares)	0
Weighted average exercise price
Beginning balance outstanding (in dollars per share)	$ 7.47
Canceled or forfeited (in dollars per share)	0
Exercise price - exercised (in dollars per share)	0
Ending balance outstanding (in dollars per share)	7.47	$ 7.47
Weighted average exercise price of options vested and expected to vest (in dollars per share)	7.47
Weighted average exercise price of options exercisable (in dollars per share)	$ 0
Weighted average remaining contractual life (years)
Weighted average remaining contractual life (years) of options outstanding	5 years 10 days	5 years 9 months 10 days
Weighted average remaining contractual life (years) of options vested and expected to vest	5 years 10 days
Aggregate intrinsic value
Aggregate intrinsic value of options outstanding	$ 8,514	$ 13,318
Aggregate intrinsic value of options vested and expected to vest	8,514
Aggregate intrinsic value of options exercisable	$ 0

Stock-based compensation - Sc_3

Stock-based compensation - Schedule of Restricted Stock Unit and Market Stock Unit Activity (Details)	9 Months Ended
	Sep. 30, 2024 $ / shares shares
RSUs
Number of Shares
Beginning balance outstanding (in shares)	9,014,435
Granted (in shares)	4,599,570
Canceled or forfeited (in shares)	(1,400,542)
Vested (in shares)	(2,406,842)
Ending balance outstanding (in shares)	9,806,621
Units expected to vest (in shares)	9,806,621
Weighted Average Grant Date Fair Value
Beginning balance outstanding (in dollars per share) \| $ / shares	$ 12.41
Granted (in dollars per share) \| $ / shares	10.31
Canceled or forfeited (in dollars per share) \| $ / shares	11.42
Vested (in dollars per share) \| $ / shares	12.30
Ending balance outstanding (in dollars per share) \| $ / shares	$ 11.60
MSUs
Number of Shares
Beginning balance outstanding (in shares)	1,800,486
Granted (in shares)	1,395,332
Canceled or forfeited (in shares)	(209,532)
Change in awards based on performance (in shares)	(118,636)
Vested (in shares)	(420,786)
Ending balance outstanding (in shares)	2,446,864
Units expected to vest (in shares)	2,446,864
Weighted Average Grant Date Fair Value
Beginning balance outstanding (in dollars per share) \| $ / shares	$ 19.28
Granted (in dollars per share) \| $ / shares	14.86
Canceled or forfeited (in dollars per share) \| $ / shares	21.05
Change in awards based on performance (in dollars per share) \| $ / shares	21.42
Vested (in dollars per share) \| $ / shares	19.39
Ending balance outstanding (in dollars per share) \| $ / shares	$ 16.60

Stockholders' equity (Details)

Stockholders' equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	500,000,000		500,000,000		500,000,000
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001		$ 0.001
Preferred stock, shares authorized (in shares)	50,000,000		50,000,000		50,000,000
Preferred stock, par value (in dollars per share)	$ 0.001		$ 0.001		$ 0.001
Option exercises		$ 591	$ 313	$ 5,584
Common Stock
Class of Stock [Line Items]
Stock issued during period for vested units (in shares)	995,796	1,102,702	2,827,628	2,692,984
Option exercises (in shares)		53,748	44,049	641,250
Option exercises		$ 1		$ 1
Stock issued under the ESPP (in shares)	172,615	162,406	325,854	273,569

Commitments and contingencies (

Commitments and contingencies (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Purchase obligation	$ 125,876

Net income (loss) per share - S

Net income (loss) per share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net income (loss)	$ 16,089	$ (13,749)	$ 22,524	$ (2,926)
Denominator:
Weighted-average shares outstanding, basic (in shares)	161,663,506	157,055,904	160,528,610	157,691,005
Dilutive effect of stock-based awards (in shares)	3,420,602	0	4,106,466	0
Weighted-average shares outstanding, diluted (in shares)	165,084,108	157,055,904	164,635,076	157,691,005
Net income (loss) per share:
Basic (in dollars per share)	$ 0.10	$ (0.09)	$ 0.14	$ (0.02)
Diluted (in dollars per share)	$ 0.10	$ (0.09)	$ 0.14	$ (0.02)

Net income (loss) per share -Sc

Net income (loss) per share -Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	6,166,836	16,621,163	6,126,612	16,869,295
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	1,175,071	5,267,371	1,187,222	5,792,252
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	544,113	9,328,583	3,309,333	9,231,891
Market stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	4,447,652	1,822,258	1,630,057	1,799,804
ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	0	202,951	0	45,348

Fair value disclosures (Details

Fair value disclosures (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Money market funds \| Level 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value	$ 15,867	$ 15,331

Related-party transactions (Det

Related-party transactions (Details) - USD ($)	1 Months Ended		3 Months Ended		9 Months Ended
Related-party transactions (Details) - USD ($)	Jun. 30, 2023	May 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Incurred expenses			$ 25,348,000	$ 22,611,000	$ 71,407,000	$ 85,673,000
Due to related party			2,000		2,000		$ 121,000
Related Party \| Consulting Services and Other
Related Party Transaction [Line Items]
Incurred expenses			4,000	0	4,000	0
Due to related party			0		0		0
Related Party \| Travel and Other
Related Party Transaction [Line Items]
Incurred expenses			2,000	$ 21,000	20,000	64,000
Due to related party			$ 0		$ 0		$ 30,000
Related Party \| Sale Of Stock
Related Party Transaction [Line Items]
Proceeds from sale of stock						0
Costs for sale of stock						$ 1,404,000
Related Party \| Sale Of Stock \| Secondary Offering
Related Party Transaction [Line Items]
Number of shares issued in sale of stock (in shares)		11,500,000
Related Party \| Sale Of Stock \| Block Trade
Related Party Transaction [Line Items]
Number of shares issued in sale of stock (in shares)	5,220,000

Restructuring - Narrative (Deta

Restructuring - Narrative (Details)		3 Months Ended
Restructuring - Narrative (Details)	Dec. 07, 2022 employee	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Restructuring and Related Activities [Abstract]
Approximate workforce reduction, number of employees \| employee	120
Remaining liability			$ 0	$ 272,000	$ 4,315,000
Restructuring activity during the period		$ 0

Restructuring - Schedule of Res

Restructuring - Schedule of Restructuring Reserve Activity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Restructuring Reserve [Roll Forward]
Beginning balance	$ 4,315
Restructuring reserve increase	69
Payments and impact of FX	(4,112)
Ending balance	$ 272