Qualys (QLYS) 10-K22 Feb 222021 FY Annual reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - USD ($) $ in Thousands	12 Months Ended
Document And Entity Information - USD ($) $ in Thousands	Dec. 31, 2021	Feb. 16, 2022	Jun. 30, 2021
Document Information [Line Items]
Entity Central Index Key	0001107843
Entity Registrant Name	QUALYS, INC.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-35662
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0534145
Entity Address, Address Line One	919 E. Hillsdale Boulevard, 4th Floor
Entity Address, City or Town	Foster City
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94404
City Area Code	650
Local Phone Number	801-6100
Title of 12(b) Security	Common stock, $0.001 par value per share
Trading Symbol	QLYS
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 2,961,000
Entity Common Stock, Shares Outstanding		39,029,415
Auditor Name	GRANT THORNTON LLP
Auditor Location	San Jose, California
Auditor Firm ID	248
ICFR Auditor Attestation Flag	true

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 137,328	$ 74,132
Short-term marketable securities	267,960	281,892
Accounts receivable, net of allowance of $793 and $725 as of December 31, 2021 and 2020, respectively	108,998	100,179
Prepaid expenses and other current assets	32,112	19,142
Total current assets	546,398	475,345
Long-term marketable securities	111,198	98,458
Property and equipment, net	61,854	64,850
Operating leases - right of use asset	37,016	44,838
Deferred tax assets, net	25,087	15,811
Total intangible assets, net	6,545	12,006
Goodwill	7,447	7,447
Restricted cash	1,200	1,200
Other noncurrent assets	17,814	16,864
Total assets	814,559	736,819
Current liabilities:
Accounts payable	1,296	731
Accrued liabilities	32,504	29,833
Deferred revenues, current	257,872	213,494
Operating lease liabilities, current	12,608	11,672
Total current liabilities	304,280	255,730
Deferred revenues, noncurrent	32,753	30,540
Lease liabilities, noncurrent	35,914	45,700
Other noncurrent liabilities	4,898	367
Total liabilities	377,845	332,337
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock: $0.001 par value; 20,000 shares authorized, no shares issued and outstanding as of December 31, 2021 and 2020	0	0
Common stock: $0.001 par value; 1,000,000 shares authorized, 39,112 and 39,253 shares issued and outstanding as of December 31, 2021 and 2020, respectively	39	39
Additional paid-in capital	477,323	401,359
Accumulated other comprehensive income (loss)	1,007	(484)
Retained earnings (accumulated deficit)	(41,655)	3,568
Total stockholders’ equity	436,714	404,482
Total liabilities and stockholders’ equity	$ 814,559	$ 736,819

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts receivable	$ 793	$ 725
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	20,000	20,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par or stated value per share (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	1,000,000	1,000,000
Common stock, shares issued (in shares)	39,112	39,253
Common stock, shares outstanding (in shares)	39,112	39,253

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 411,172	$ 362,963	$ 321,607
Cost of revenues	89,439	79,226	69,517
Gross profit	321,733	283,737	252,090
Operating expenses:
Research and development	81,289	72,548	68,239
Sales and marketing	76,487	67,965	70,833
General and administrative	76,274	46,570	40,765
Total operating expenses	234,050	187,083	179,837
Income from operations	87,683	96,654	72,253
Other income (expense), net:
Interest expense	0	(9)	(106)
Interest income	2,287	5,385	8,443
Other income (expense), net	(573)	7	(607)
Total other income, net	1,714	5,383	7,730
Income before income taxes	89,397	102,037	79,983
Income tax provision	18,437	10,465	10,647
Net income	$ 70,960	$ 91,572	$ 69,336
Net income per share:
Basic (in dollars per share)	$ 1.82	$ 2.34	$ 1.77
Diluted (in dollars per share)	$ 1.77	$ 2.25	$ 1.68
Weighted average shares used in computing net income per share:
Basic (in shares)	39,030	39,167	39,075
Diluted (in shares)	40,118	40,740	41,284

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 70,960	$ 91,572	$ 69,336
Other comprehensive income (loss), net of tax
Net change in unrealized gains (losses) on available-for-sale debt securities, net of tax	(1,409)	402	1,367
Net change in unrealized gains (losses) on cash flow hedges, net of tax	2,900	(2,048)	381
Other comprehensive income (loss), net of tax	1,491	(1,646)	1,748
Comprehensive income	$ 72,451	$ 89,926	$ 71,084

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flow from operating activities:
Net income	$ 70,960	$ 91,572	$ 69,336
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	35,897	32,845	31,201
Write off of noncurrent asset	625	0	0
Bad debt expense	402	486	247
Loss on disposal of property and equipment	12	106	202
Stock-based compensation	67,579	40,035	34,892
Amortization of premiums (accretion of discounts) on marketable securities	3,869	826	(1,597)
Deferred income taxes	(9,723)	3,512	7,095
Changes in operating assets and liabilities:
Accounts receivable	(9,221)	(22,631)	(2,456)
Prepaid expenses and other assets	(15,665)	(2,329)	(6,012)
Accounts payable	(32)	(389)	(1,076)
Accrued liabilities and other noncurrent liabilities	9,322	5,126	715
Deferred revenues	46,591	30,927	28,060
Net cash provided by operating activities	200,616	180,086	160,607
Cash flow from investing activities:
Purchases of marketable securities	(368,450)	(391,693)	(331,131)
Sales and maturities of marketable securities	363,941	341,879	328,350
Purchases of property and equipment	(24,424)	(30,037)	(27,573)
Proceeds from disposal of property and equipment	6	419	0
Purchases of intangible assets	(1,230)	(1,500)	(4,050)
Maturity (purchase) of note receivable	625	0	(625)
Net cash used in investing activities	(29,532)	(80,932)	(35,029)
Cash flow from financing activities:
Repurchase of common stock	(129,977)	(126,729)	(86,424)
Proceeds from exercise of stock options	49,994	34,461	24,831
Payments for taxes related to net share settlement of equity awards	(27,815)	(20,199)	(15,743)
Principal payments under finance lease obligations	(90)	(114)	(1,709)
Net cash used in financing activities	(107,888)	(112,581)	(79,045)
Net increase (decrease) in cash, cash equivalents and restricted cash	63,196	(13,427)	46,533
Cash, cash equivalents and restricted cash at beginning of period	75,332	88,759	42,226
Cash, cash equivalents and restricted cash at end of period	138,528	75,332	88,759
Supplemental disclosures of cash flow information
Cash paid for interest expense	0	9	107
Cash paid for income taxes, net of refunds	35,080	8,058	3,031
Non-cash investing and financing activities
Purchases of intangible assets recorded in accrued liabilities	120	150	150
Purchases of property and equipment recorded in accounts payable and accrued liabilities	$ 2,086	$ 1,054	$ 235

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balances (in shares) at Dec. 31, 2018	39,015
Balance at Dec. 31, 2018	$ 39	$ 330,572	$ (586)	$ 27,964	$ 357,989
Net income	0	0	0	69,336	69,336
Other comprehensive income (loss), net of tax	$ 0	0	1,748	0	1,748
Issuance of common stock upon exercise of stock options (in shares)	901
Issuance of common stock upon exercise of stock options	$ 1	24,830	0	0	24,831
Repurchase of common stock (in shares)	(1,026)
Repurchase of common stock	$ (1)	(12,317)	0	(74,106)	(86,424)
Issuance of common stock upon vesting of restricted stock units (in shares)	439
Issuance of common stock upon vesting of restricted stock units	$ 0	0	0	0	0
Taxes related to net share settlement of equity awards (in shares)	(183)
Taxes related to net share settlement of equity awards	$ 0	(15,743)	0	0	(15,743)
Stock-based compensation	$ 0	35,066	0	0	35,066
Balances (in shares) at Dec. 31, 2019	39,146
Balance at Dec. 31, 2019	$ 39	362,408	1,162	23,194	386,803
Net income	0	0	0	91,572	91,572
Other comprehensive income (loss), net of tax	$ 0	0	(1,646)	0	(1,646)
Issuance of common stock upon exercise of stock options (in shares)	1,130
Issuance of common stock upon exercise of stock options	$ 1	34,460	0	0	34,461
Repurchase of common stock (in shares)	(1,293)
Repurchase of common stock	$ (1)	(15,530)	0	(111,198)	(126,729)
Issuance of common stock upon vesting of restricted stock units (in shares)	476
Issuance of common stock upon vesting of restricted stock units	$ 0	0	0	0	0
Taxes related to net share settlement of equity awards (in shares)	(206)
Taxes related to net share settlement of equity awards	$ 0	(20,199)	0	0	(20,199)
Stock-based compensation	$ 0	40,220	0	0	40,220
Balances (in shares) at Dec. 31, 2020	39,253
Balance at Dec. 31, 2020	$ 39	401,359	(484)	3,568	404,482
Net income	0	0	0	70,960	70,960
Other comprehensive income (loss), net of tax	$ 0	0	1,491	0	$ 1,491
Issuance of common stock upon exercise of stock options (in shares)	725				725	[1]
Issuance of common stock upon exercise of stock options	$ 1	49,993	0	0	$ 49,994
Repurchase of common stock (in shares)	(1,148)
Repurchase of common stock	$ (1)	(13,793)	0	(116,183)	(129,977)
Issuance of common stock upon vesting of restricted stock units (in shares)	530
Issuance of common stock upon vesting of restricted stock units	$ 0	0	0	0	0
Taxes related to net share settlement of equity awards (in shares)	(248)
Taxes related to net share settlement of equity awards	$ 0	(27,815)	0	0	(27,815)
Stock-based compensation	$ 0	67,579	0	0	67,579
Balances (in shares) at Dec. 31, 2021	39,112
Balance at Dec. 31, 2021	$ 39	$ 477,323	$ 1,007	$ (41,655)	$ 436,714

[1]	Included 348 thousand shares of PSOs.

Note 1 - The Company and Summar

Note 1 - The Company and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Basis of Presentation and Significant Accounting Policies [Text Block]	NOTE 1. The Company and Summary of Significant Accounting Policies Description of Business Qualys, Inc. (the “Company”, “we”, “us”, “our”) was incorporated in the state of Delaware on December 30, 1999. Basis of Presentation The accompanying consolidated financial statements and footnotes have been prepared in accordance with U.S. GAAP as well as the instructions to Form 10 Risks and Uncertainties In March 2020, 19 19, may may not 19 not 2022, 19 may Use of Estimates The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of assets and liabilities at the date of the consolidated financial statements and the reported results of operations during the reporting period. The Company’s management regularly assesses these estimates, which primarily affect revenue recognition, allowance for credit loss, the valuation of goodwill and intangible assets, leases, stock-based compensation and income tax provision. Actual results could differ from those estimates and such differences may Concentration of Credit Risk The Company invests its cash and cash equivalents with major financial institutions. Cash balances with any one may not not Credit risk with respect to accounts receivable is dispersed due to the large number of customers. Collateral is not December 31, 2021 2020 no 10% Cash, Cash Equivalents, Restricted cash and Short-Term and Long-Term Marketable Securities Cash and cash equivalents include cash held in banks, highly liquid money market funds and commercial paper, all with original maturities of three As of both December 31, 2021 2020 Cash equivalents are stated at cost, which approximates fair market value. Short-term and long-term marketable securities are classified as available-for-sale debt securities (AFS debt securities) and are carried at fair value. Unrealized gains and losses in fair value of the AFS debt securities are reported in other comprehensive income (loss). When the AFS debt securities are sold, cost is based on the specific identification method, and the realized gains and losses are included in other income (expense), net in the consolidated statements of operations. AFS debt securities are reviewed quarterly for impairment. An investment is considered impaired when its fair value is below its amortized cost. Declines in fair value from amortized cost for AFS debt securities that the company intends to sell or will more likely than not Accounts Receivable Accounts receivable are recorded at the invoiced amount and do not may not December 31, 2021 2020 Non-marketable securities In 2018, not no may not No not In 2019, fourth December 31, 2021, not no December 31, 2021. Property and Equipment, net Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which range from three five The Company purchases physical scanner appliances and other computer equipment that are provided to customers on a subscription basis. This equipment is recorded within property and equipment and the depreciation is recorded in cost of revenues over an estimated useful life of three Upon retirement or disposal, the cost of assets and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in the consolidated statements of operations. Repairs and maintenance that do not Leases The Company leases certain offices, computer equipment and its data center facilities under finance leases and non-cancelable operating leases. For both operating and finance leases, we recognize a right-of-use asset, which represents our right to use the underlying asset for the lease term, and a lease liability, which represents the present value of our obligation to make payments arising over the lease term. Many of our leases include rental escalation clauses, renewal options and/or termination options that are factored into our determination of lease payments and lease terms when appropriate. The present value of the lease payments is calculated using the incremental borrowing rate of the underlying leases determined at lease commencement. As most of our leases do not Where the Company is the lessee, the Company elects to account for non-lease components associated with its leases (e.g., common area maintenance costs) and lease components separately for substantially all of its asset classes, except for data centers, for which the Company elected to combine lease and non-lease components. For leases with a term of one not In arrangements where the Company is the lessor, the Company elected to apply the practical expedient to account for lease components (e.g., customer premise equipment) and non-lease components (e.g., service revenue) as combined components as revenue under ASC 606 Impairment of Long-Lived Assets The Company evaluates its long-lived assets, which consist of property and equipment, and intangible assets subject to amortization, for indicators of possible impairment when events or changes in circumstances indicate the carrying amount of an asset may not December 31, 2021 2020 2019 Goodwill and Intangible Assets Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. Goodwill and indefinite-lived intangible assets are not may one In testing for a potential impairment of goodwill and the indefinite-lived intangible assets, the Company first not 50% not no December 1, 2021 2020 no Business Combinations The Company applies the provisions of ASC 805, may one Derivative Financial Instruments Derivative financial instruments are utilized by the Company to reduce foreign currency exchange risks. The Company uses foreign currency forward contracts, with maturities of 13 first Stock-Based Compensation The Company recognizes the fair value of its stock options, restricted stock units (“RSUs”) and stock purchase rights under the employee stock purchase plan (the “ESPP”) on a straight-line basis over the requisite service periods. The fair value of each stock option or stock purchase right is estimated on the date of grant using the Black-Scholes-Merton option pricing model and the fair value of each RSU is based on the Company's common stock price on the date of grant. Compensation expenses for performance-based stock options (“PSOs”) and performance-based restricted stock units (“PSUs”) are recorded based on expected achievement of the performance metrics specified in the grant, which are assessed on a quarterly basis. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture materially differs from original estimates. Revenue Recognition The Company derives revenues from subscriptions that require customers to pay a fee in order to access the Company’s cloud solutions. Contract period with customers generally ranges from less than a year to five not not not The Company determines revenue recognition through the following steps: • Identification of the contract, or contracts, with a customer; • Identification of the performance obligations in the contract; • Determination of the transaction price • Allocation of the transaction price to the performance obligations in the contract; and • Recognition of revenue when, or as, the Company satisfies a performance obligation. At the inception of a customer contract, the Company makes an assessment as to that customer's ability to pay for the services provided. The Company assesses collectability based on several factors, including credit worthiness of the customer along with past transaction history. In addition, the Company performs periodic evaluations of its customers’ financial condition. Most of the Company’s revenue contracts are subscription based and contain a single performance obligation. The subscription contracts typically do not not not As the Company's cloud-based subscription services are delivered to customers electronically and over time, revenue is generally recognized ratably over the contract terms. When physical equipment is provided to the customers as part of the subscription service contract, the Company applies the practical expedient allowed under ASC 842 606, Contract modifications happen when there is an upsell, where the customers subsequently enter into contract with the Company to purchase additional product offerings or additional scans for additional devices. Contract modifications related to upsells are typically accounted for prospectively. Deferred revenues consist of customer contracts billed or cash received that will be recognized in the future under subscriptions existing at the balance sheet date. The current portion of deferred revenues represents amounts that are expected to be recognized within one Costs of shipping and handling charges incurred by the Company associated with physical scanner appliances and other computer equipment are included in cost of revenues. Sales taxes and other taxes collected from customers to be remitted to government authorities are excluded from revenues. Incremental direct costs of obtaining a contract, which consist of sales commissions primarily for new business and upsells, are deferred and amortized over the estimated life of the customer relationship if renewals are expected and the renewal commission is not one five Advertising Expenses Advertising costs are expensed as incurred and are included in sales and marketing expense in the consolidated statements of operations. The Company incurred advertising costs of $2.1 million, $1.6 million and $1.5 million for the years ended December 31, 2021 , 2020 and 2019 , respectively. Income Taxes The Company provides for the effect of income taxes in its consolidated financial statements using the asset and liability method which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, net operating loss carryovers, and tax credit carry forwards. The Company regularly reviews its deferred tax assets for recoverability and establishes a valuation allowance if it is more likely than not not Income tax expense or benefit is recognized for the amount of taxes payable or refundable for the current year and for deferred tax assets and liabilities for the tax consequences of events that have been recognized in an entity’s financial statements or tax returns. The Company must make significant assumptions, judgments and estimates to determine its current income tax provision (benefit), its deferred tax assets and liabilities, and any valuation allowance to be recorded against its deferred tax assets. The Company's estimates and assumptions may The Company applies a two not not 50% 12 may Comprehensive Income (Loss) Other comprehensive income (loss) consists of unrealized gains (losses) on marketable securities, net of tax, and derivative financial instruments designated as cash flow hedges which are not Foreign Currency Transactions The Company’s operations are conducted in various countries around the world and the financial statements of its foreign subsidiaries are reported in the U.S. dollar as their respective functional currency. Monetary assets and liabilities denominated in foreign currencies have been re-measured into U.S. dollars using the exchange rates in effect at the balance sheet date, and income and expenses are re-measured at average exchange rates during the period. Foreign currency re-measurement gains and losses and foreign currency transaction gains and losses are recognized in other income (expense), net. Net Income Per Share Basic net income per share is computed by dividing net income by the weighted-average number of shares outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted-average number of shares outstanding plus potentially dilutive shares outstanding during the period. The potentially dilutive shares are computed by applying the treasury stock method to the Company's stock options, RSUs and the stock purchase rights under the ESPP. Any potential shares that would be anti-dilutive are excluded from the computation of diluted net income per share. Recently Adopted Accounting Pronouncements In December 2019, No. 2019 12, 2019 12" 740, 2019 12 December 15, 2020. 2019 12 first 2021 no Recently Issued Accounting Pronouncements Not The Company does not not

Note 2 - Fair Value of Financia

Note 2 - Fair Value of Financial Instruments	12 Months Ended
Note 2 - Fair Value of Financial Instruments	Dec. 31, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	NOTE 2. Fair Value of Financial Instruments Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. For certain of the Company’s financial instruments, including certain cash equivalents, accounts receivable, accounts payable and accrued liabilities, the carrying amounts approximate their fair values due to the relatively short maturity of these balances. The Company measures and reports certain cash equivalents, marketable securities, derivative foreign currency forward contracts at fair value in accordance with the provisions of the authoritative accounting guidance that addresses fair value measurements. This guidance establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. The hierarchy is broken down into three Level 1 Level 2 Level 3 The Company's financial instruments consist of assets and liabilities measured using Level 1 2 1 2 The Company's cash and cash equivalents and marketable securities consist of the following: December 31, 2021 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) Cash and cash equivalents: Cash $ 61,220 $ — $ — $ 61,220 Money market funds 75,258 — — 75,258 Commercial paper 850 — — 850 Total 137,328 — — 137,328 Short-term marketable securities: Commercial paper 28,869 101 (7 ) 28,963 Corporate bonds 3,952 — — 3,952 Asset-backed securities 217,160 2 (163 ) 216,999 U.S. Treasury and government agencies 18,046 — — 18,046 Total 268,027 103 (170 ) 267,960 Long-term marketable securities: Asset-backed securities 14,941 6 (36 ) 14,911 U.S. Treasury and government agencies 37,664 — (136 ) 37,528 Foreign government 1,007 12 — 1,019 Corporate bonds 57,762 160 (182 ) 57,740 Total 111,374 178 (354 ) 111,198 Total $ 516,729 $ 281 $ (524 ) $ 516,486 December 31, 2020 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) Cash and cash equivalents: Cash $ 33,105 $ — $ — $ 33,105 Money market funds 38,028 — — 38,028 Commercial paper 2,999 — — 2,999 Total 74,132 — — 74,132 Short-term marketable securities: Commercial paper 6,147 — — 6,147 Corporate bonds 24,368 170 — 24,538 Asset-backed securities 6,263 18 — 6,281 U.S. Treasury and government agencies 244,568 369 (11 ) 244,926 Total 281,346 557 (11 ) 281,892 Long-term marketable securities: Asset-backed securities 38,456 160 (3 ) 38,613 U.S. Treasury and government agencies 6,884 17 — 6,901 Foreign government 1,006 31 — 1,037 Corporate bonds 51,068 839 — 51,907 Total 97,414 1,047 (3 ) 98,458 Total $ 452,892 $ 1,604 $ (14 ) $ 454,482 As of December 31, 2021 2020 no 12 not The following table sets forth by level within the fair value hierarchy the fair value of the Company's cash equivalents and marketable securities measured on a recurring basis: December 31, 2021 Level 1 Level 2 Fair Value (in thousands) Money market funds $ 75,258 $ — $ 75,258 Commercial paper — 18,896 18,896 U.S. Treasury and government agencies — 254,527 254,527 Foreign government — 1,019 1,019 Corporate bonds — 86,703 86,703 Asset-backed securities — 18,863 18,863 Total $ 75,258 $ 380,008 $ 455,266 December 31, 2020 Level 1 Level 2 Fair Value (in thousands) Money market funds $ 38,028 $ — $ 38,028 Commercial paper — 9,146 9,146 U.S. Treasury and government agencies — 251,827 251,827 Foreign government — 1,037 1,037 Corporate bonds — 76,445 76,445 Asset-backed securities — 44,894 44,894 Total $ 38,028 $ 383,349 $ 421,377 The following summarizes the fair value of marketable securities by contractual maturity: December 31, 2021 Mature within One Year Mature after One Year through Two Years Mature over Two Years Fair Value (in thousands) Commercial paper $ 18,896 $ — $ — $ 18,896 U.S. Treasury and government agencies 216,999 37,528 — 254,527 Foreign government — 1,019 — 1,019 Corporate bonds 28,964 38,407 19,332 86,703 Asset-backed securities 3,951 7,959 6,953 18,863 Total $ 268,810 $ 84,913 $ 26,285 $ 380,008 Derivative Financial Instruments Designated cash flow hedges The Company enters into foreign currency forward contracts to reduce the risk of variability in future cash flow due to foreign currency exchange rate fluctuation from certain forecasted subscription revenue orders billed in GBP and Euro and operation expenses incurred in INR, which are designated as cash flow hedges. Unrealized foreign exchange gains or losses related to those designated cash flow hedge contracts are recorded in Accumulated other comprehensive income ("AOCI") and will be reclassified into revenues or operating expenses, respectively, in the same periods when the hedged transactions hit earnings. As of December 31, 2021 , the Company had designated cash flow hedge forward contracts with notional amounts of €29.8 £9.4 Rs.2,955.3 December 31, 2020 , the Company had designated cash flow hedge forward contracts with notional amounts of €25.9 £8.7 Rs.1,933.5 December 31, 2021 , a net amount of unrealized gains of $1.0 million before tax on the foreign currency forward contracts for GBP and Euro reported in AOCI is expected to be reclassified into revenue within the next 12 December 31, 2021 , a net amount of unrealized gains of $0.3 million before tax on the foreign currency forward contracts for INR reported in AOCI is expected to be reclassified into operating expenses within the next 12 Non-designated forward contracts The Company also uses foreign currency forward contracts to hedge certain foreign currency denominated assets or liabilities, which are not As of December 31, 2021 , the Company had non-designated forward contracts with notional amounts of €34.5 £11.6 Rs.74.9 C$2.5 CHF1.0 December 31, 2020 , the Company had non-designated forward contracts with notional amounts of €17.7 £6.5 Rs.32.8 The following summarizes derivative financial instruments as of December 31, 2021 and 2020 : December 31, 2021 2020 (in thousands) Assets Foreign currency forward contracts designated as cash flow hedge $ 1,737 $ 511 Foreign currency forward contracts not designated as hedging instruments 1,599 27 Total $ 3,336 $ 538 Liabilities Foreign currency forward contracts designated as cash flow hedge $ (181 ) $ (2,200 ) Foreign currency forward contracts not designated as hedging instruments (207 ) (1,677 ) Total $ (388 ) $ (3,877 ) All foreign currency forward contracts were valued at fair value using Level 2 The following summarizes the gains (losses) recognized from forward contracts and other foreign currency transactions in other income (expense), net in the consolidated statements of operations: Year Ended December 31, 2021 2020 2019 (in thousands) Net gains (losses) from non-designated forward contracts $ 2,452 $ (1,634 ) $ 438 Other foreign currency transactions gains (losses) (2,749 ) 1,894 (792 ) Total foreign exchange gains (losses), net (297 ) 260 (354 ) Other expenses (276 ) (253 ) (253 ) Other income (expense), net $ (573 ) $ 7 $ (607 )

Note 3 - Accumulated Other Comp

Note 3 - Accumulated Other Comprehensive Income (Loss)	12 Months Ended
Note 3 - Accumulated Other Comprehensive Income (Loss)	Dec. 31, 2021
Notes to Financial Statements
Accumulated Other Comprehensive Income Disclosure [Text Block]	NOTE 3 . Accumulated Other Comprehensive Income (Loss) The components and changes in accumulated other comprehensive income (loss) were as follows: Available-for-sale debt securities Cash flow hedges Total (in thousands) Balances at December 31, 2018 $ (545 ) $ (41 ) $ (586 ) Change in unrealized gains during the period 1,610 651 2,261 Net gains reclassified into income during the period — (169 ) (169 ) Income tax provision (243 ) (101 ) (344 ) Net change during the period 1,367 381 1,748 Balances at December 31, 2019 822 340 1,162 Change in unrealized gains (losses) during the period 549 (2,099 ) (1,550 ) Net gains reclassified into income during the period (25 ) (564 ) (589 ) Income tax benefit (provision) (122 ) 615 493 Net change during the period 402 (2,048 ) (1,646 ) Balances at December 31, 2020 1,224 (1,708 ) (484 ) Change in unrealized gains (losses) during the period (1,854 ) 2,837 983 Net losses reclassified into income during the period 22 933 955 Income tax benefit (provision) 423 (870 ) (447 ) Net change during the period (1,409 ) 2,900 1,491 Balances at December 31, 2021 $ (185 ) $ 1,192 $ 1,007 The effects on income before income taxes of amounts reclassified from AOCI to the consolidated statements of operations were as follows: Year Ended December 31, 2021 2020 2019 (in thousands) Reclassification of AOCI - Available-for-sale debt securities Other income (expense), net $ (22 ) $ 25 $ — Reclassification of AOCI - Cash flow hedges Revenues $ (1,667 ) $ 960 $ 169 Cost of revenues 149 (76 ) — Research and development 492 (264 ) — Sales and marketing 28 (20 ) — General and administrative 65 (36 ) — Total $ (933 ) $ 564 $ 169

Note 4 - Property and Equipment

Note 4 - Property and Equipment, Net	12 Months Ended
Note 4 - Property and Equipment, Net	Dec. 31, 2021
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	NOTE 4. Property and Equipment, Net Property and equipment, net, which includes assets under finance leases, consists of the following: December 31, 2021 2020 (in thousands) Computer equipment $ 161,809 $ 136,286 Computer software 25,807 26,164 Leasehold improvements 21,092 21,107 Scanner appliances 16,510 16,749 Furniture, fixtures and equipment 6,479 6,599 Finance leases - right of use asset — 3,503 Total property and equipment 231,697 210,408 Less: accumulated depreciation and amortization (169,843 ) (145,558 ) Property and equipment, net $ 61,854 $ 64,850 As of December 31, 2021 and 2020 , physical scanner appliances and other computer equipment that are or will be subject to leases by customers had a net carrying value of $5.3 $7.5 not $1.3 $1.9 December 31, 2021 , 2020 and 2019 , respectively. Assets under finance leases were acquired upon completion of lease term and placed within computer equipment as of December 31, 2021.

Note 5 - Revenue from Contracts

Note 5 - Revenue from Contracts with Customers	12 Months Ended
Note 5 - Revenue from Contracts with Customers	Dec. 31, 2021
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	NOTE 5. Revenue from Contracts with Customers The Company records deferred revenue when cash payments are received or due in advance of its performance obligations offset by revenue recognized in the period. Revenues of $211.0 million and $188.6 million were recognized during the years ended December 31, 2021 and December 31, 2020 , respectively, which amounts were included in the deferred revenue balances as of December 31, 2020 and December 31, 2019 , respectively. The Company's payment terms vary by the type and location of its customers. The term between invoicing and when payment is due is not The following table sets forth the expected revenue from all remaining performance obligations as of December 31, 2021 (in thousands) 2022 $ 142,812 2023 101,482 2024 36,361 2025 2,422 2026 499 2027 and thereafter 110 Total $ 283,687 Revenues allocated to remaining performance obligations represents the transaction price of noncancelable orders for which service has not one From time to time, the Company enters into contracts with customers that extend beyond one one not Revenues by sales channel are as follows: Year Ended December 31, 2021 2020 2019 (in thousands) Direct $ 242,709 $ 212,296 $ 186,130 Partner 168,463 150,667 135,477 Total $ 411,172 $ 362,963 $ 321,607 The Company utilizes partners to enable and accelerate the adoption of its cloud platform by increasing its distribution capabilities and market awareness of its cloud platform as well as by targeting geographic regions outside the reach of its direct sales force. The Company's channel partners maintain relationships with their customers throughout the territories in which they operate and provide their customers with services and third may one not 13, Deferred costs to obtain contracts are as follows: December 31, 2021 2020 (in thousands) Current $ 4,223 $ 3,459 Noncurrent $ 8,391 $ 6,906 For the years ended December 31, 2021 , 2020 and 2019 , the Company recognized $4.0 million, $3.0 million and $2.0 million, respectively, of amortization expense relating to deferred costs to obtain contracts During the same periods, there was no impairment loss related to the deferred costs to obtain contracts.

Note 6 - Acquisitions

Note 6 - Acquisitions	12 Months Ended
Note 6 - Acquisitions	Dec. 31, 2021
Notes to Financial Statements
Business Combination Disclosure [Text Block]	NOTE 6. Acquisitions The following table summarizes the purchase price allocation of business and asset acquisitions for the years ended December 31, 2021 2020 2019 Acquiree Acquisition Date Purchase Consideration Purchased Intangible Assets Goodwill (in thousands) TotalCloud August 19, 2021 $ 1,200 $ 1,200 $ — Spell security July 24, 2020 $ 1,500 $ 1,500 $ — Adya January 10, 2019 $ 1,000 $ 900 $ 100 On August 19, 2021, one five On July 24, 2020, October 2021. four two On January 10, 2019, 18 December 31, 2020. four There were no December 31, 2021 2020

Note 7 - Intangible Assets, Net

Note 7 - Intangible Assets, Net	12 Months Ended
Note 7 - Intangible Assets, Net	Dec. 31, 2021
Notes to Financial Statements
Intangible Assets Disclosure [Text Block]	NOTE 7. Intangible Assets, Net Intangible assets consist primarily of developed technology and patent licenses acquired from business or asset acquisitions. Acquired intangibles are amortized on a straight-line basis over the respective estimated useful lives of the assets. The carrying values of intangible assets are as follows: December 31, 2021 (in thousands) Weighted Average Life (Years) Weighted Average Remaining Life (Years) Cost Accumulated Amortization Net Book Value Developed technology 4.5 0.9 $ 28,556 $ (22,463 ) $ 6,093 Patent licenses 14.0 2.7 1,387 (1,121 ) 266 Non-compete agreements 2.0 0.6 500 (354 ) 146 Total intangibles subject to amortization $ 30,443 $ (23,938 ) 6,505 Intangible assets not subject to amortization 40 Total intangible assets, net $ 6,545 December 31, 2020 (in thousands) Weighted Average Life (Years) Weighted Average Remaining Life (Years) Cost Accumulated Amortization Net Book Value Developed technology 4.4 1.8 $ 27,356 $ (16,152 ) $ 11,204 Patent licenses 14.0 3.7 1,387 (1,021 ) 366 Non-compete agreements 2.0 1.6 500 (104 ) 396 Total intangibles subject to amortization $ 29,243 $ (17,277 ) 11,966 Intangible assets not subject to amortization 40 Total intangible assets, net $ 12,006 Intangible assets amortization expenses were $6.7 million, $6.3 million and $6.1 million for the December 31, 2021 2020 2019 As of December 31, 2021 (in thousands) 2022 $ 5,063 2023 590 2024 452 2025 240 2026 160 Total expected future amortization expense $ 6,505

Note 8 - Leases

Note 8 - Leases	12 Months Ended
Note 8 - Leases	Dec. 31, 2021
Notes to Financial Statements
Lessee, Operating Leases and Finance Lease [Text Block]	NOTE 8. Leases The Company leases certain offices, computer equipment and its data center facilities under non-cancelable operating leases for varying periods through 2028. not not December 31, 2021 , 2020 and 2019 , respectively. Supplemental cash flow information related to operating leases was as follows: Year Ended December 31, 2021 2020 2019 (in thousands) Cash payments included in the measurement of lease liabilities $ 14,646 $ 13,403 $ 9,372 Lease liabilities arising from obtaining right-of-use assets $ 4,110 $ 15,837 $ 17,359 The weighted average remaining lease term and the weighted average discount rate of the Company's operating leases were as follows: December 31, 2021 2020 Weighted average remaining lease term (years) 3.3 4.1 Weighted average discount rate 4.8 % 4.8 % Maturities of the Company's operating lease liabilities as of December 31, 2021 (in thousands) 2022 $ 14,543 2023 12,042 2024 10,735 2025 6,536 2026 4,498 2027 and thereafter 5,819 Total minimum lease payments 54,173 Less: interest (5,651 ) Present value of net minimum lease payments 48,522 Less: lease liabilities, current (12,608 ) Lease liabilities, noncurrent $ 35,914

Note 9 - Commitment and Conting

Note 9 - Commitment and Contingencies	12 Months Ended
Note 9 - Commitment and Contingencies	Dec. 31, 2021
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE 9. Commitment and Contingencies Purchase Obligation The Company has entered into agreements to purchase goods and services in the ordinary course of business. As of December 31, 2021 (in thousands) 2022 $ 23,672 2023 11,488 2024 7,599 2025 936 Total purchase commitments $ 43,695 Indemnifications The Company from time to time enters into certain types of contracts that contingently require it to indemnify various parties against claims from third may may not not The Company maintains director and officer insurance, which may Legal Proceedings From time to time the Company may As of December 31, 2021 not

Note 10 - Stockholders' Equity

Note 10 - Stockholders' Equity and Stock-based Compensation	12 Months Ended
Note 10 - Stockholders' Equity and Stock-based Compensation	Dec. 31, 2021
Notes to Financial Statements
Shareholders' Equity and Share-based Payments [Text Block]	NOTE 10. Stockholders' Equity and Stock-based Compensation Preferred Stock Effective October 3, 2012, December 31, 2021 2020 Common Stock Equity Incentive Plan 2000 Under the 2000 “2000 not not four ten 2000 2000 2000 2012 The 2012 “2012 September 2012 September 26, 2012. 2012 2012 January 1 December 31, 2021 2012 December 31, 2021 2012 may four may may may no ten 2021 On June 9, 2021, 2021 December 31, 2021. August 16 February 16 may first first August 16, 2021 February 15, 2022. Stock-based Compensation The following table shows a summary of the stock-based compensation expenses included in the consolidated statements of operations for the years ended December 31, 2021 2020 2019 Year Ended December 31, 2021 2020 2019 (in thousands) Cost of revenues $ 3,782 $ 2,767 $ 2,262 Research and development 10,750 13,502 11,151 Sales and marketing 6,323 5,785 4,984 General and administrative 46,724 17,981 16,495 Total stock-based compensation $ 67,579 $ 40,035 $ 34,892 The income tax benefit related to the stock-based compensation expenses was $6.2 million, $5.5 million and December 31, 2021 2020 2019 As of December 31, 2021 , the Company had unrecognized stock-based compensation expenses of $16.7 million, $77.0 million and $0.2 million related to options, RSUs and ESPP, respectively, which are expected to be recognized over weighted-average periods of 2.8 years, 2.8 years and 0.1 years, respectively. Performance-Based Stock Options and Restricted Stock Units On December 21, 2018, 2019 first January 1, 2019. second three January 2019 December 2021. three January 2019 December 2021 2021. third one third 2019, 2020 2021. On November 2, 2019, 2020 first December 1, 2019. second three January 2020 December 2022. On December 10, 2020, 2021 first November 1, 2020. second three January 2021 December 2023. The vesting of the above awards was conditioned on Mr. Courtot’s continued service through the vesting dates or, for PSOs and PSUs, the dates that performance is certified in addition to the achievement of performance goals. If Mr. Courtot’s employment was terminated (a) by reason of death or disability or (b) by the Company for reasons other than cause or good reason within 12 months following a change in control, then 100% of any unvested portions of these awards would vest, with any vesting in connection with change in control terminations conditioned upon the effectiveness of a release of claims in favor of the Company. In February 2021 2020, 2019 2020 2019, On March 19, 2021, 2021, 2020 2019 December 31, 2021. On April 27, 2021, three January 2021 December 2023. 0% 200% 100% On October 28, 2021, three three January 2022 December 2024. first second 100% first second 100%, third third 12 100% For the years ended December 31, 2021 , 2020 and 2019 , stock-based compensation expenses of $13.3 $0.2 $0.3 Stock Options The weighted-average grant date fair value of the Company’s stock options granted for the years ended December 31, 2021 2020 2019 $41.23, $34.02, Year Ended December 31, 2021 2020 2019 Expected term (in years) 5.2 to 5.5 4.5 to 5.5 4.4 to 6.6 Volatility 38% to 41 % 38% to 43 % 40% to 46 % Risk-free interest rate 0.5% to 1.2 % 0.3% to 1.4 % 1.5% to 2.4 % Dividend yield — — — The expected term of the options is based on evaluations of historical and expected future employee exercise behavior. The risk-free interest rate is based on the U.S. Treasury rates at the date of grant with maturity dates equal to the expected term at the grant date. The volatility was estimated using the historical volatility derived from the Company's common stock. The Company has not not A summary of the Company’s stock option activity is as follows: Outstanding Options Weighted Average Exercise Price Weighted Average Remaining Contractual Life Aggregate Intrinsic Value (in thousands) (Years) (in thousands) Balance as of December 31, 2020 2,215 $ 59.07 6.5 $ 139,121 Granted 495 $ 112.43 Exercised (725 ) (1) $ 68.91 Canceled (147 ) $ 102.92 Balance as of December 31, 2021 1,838 $ 66.05 6.0 $ 130,791 Vested and expected to vest - December 31, 2021 1,659 $ 61.43 5.7 $ 125,769 Exercisable - December 31, 2021 1,168 $ 42.60 4.3 $ 110,495 ( 1 The total intrinsic value of options exercised for the years ended December 31, 2021 , 2020 and 2019 was $42.5 million, $77.5 million and $52.1 million, respectively. Intrinsic value of an option is the difference between the fair value of the Company’s common stock at the time of exercise and the exercise price paid. Restricted Stock Units A summary of the Company’s RSU activity is as follows: Outstanding RSUs Weighted Average Grant Date Fair Value (in thousands) Balance as of December 31, 2020 1,047 $ 86.78 Granted 583 (1) $ 114.59 Vested (530 ) (2) $ 84.97 Canceled (183 ) $ 90.42 Balance as of December 31, 2021 917 (3) $ 104.78 Outstanding and expected to vest - December 31, 2021 815 $ 104.22 ( 1 2021 2020. ( 2 2020. ( 3 2021. The aggregate fair value of RSUs vested for the years ended December 31, 2021 2020 2019 $59.5 million, $46.5 million and $37.9 million, respectively. Employee Stock Purchase Plan The weighted-average grant date fair value of the Company’s ESPP for the year ended December 31, 2021 Year Ended December 31, 2021 Expected term (in years) 0.5 Volatility 34 % Risk-free interest rate 0.1 % Dividend yield — The expected term of the ESPP represents the six not not Share Repurchase Program The Company's share repurchase program was authorized by the board of directors as follows: Announcement Date Authorized Dollar Value (in millions) February 12, 2018 $ 100.0 October 30, 2018 100.0 October 30, 2019 100.0 May 7, 2020 100.0 February 10, 2021 100.0 November 3, 2021 200.0 Total as of December 31, 2021 $ 700.0 Shares may 10b 18 1934, 10b5 1 first For the years ended December 31, 2021 2020 2019 ased shares, 1.3 million shares and 1.0 million shares of its common stock for $130.0 million, $126.7 million and $86.4 million, respectively December 31, 2021 million

Note 11 - Employee Benefits Pla

Note 11 - Employee Benefits Plan	12 Months Ended
Note 11 - Employee Benefits Plan	Dec. 31, 2021
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	NOTE 11. Employee Benefits Plan The Company’s 401 2000 401 401 401 December 31, 2021 , 2020 and 2019 , the Company made contributions to the 401 The Company contributes to a Provident Fund Plan for its employees in India, which is a defined contribution plan set up in accordance with local labor and tax laws. Gratuity is also paid by the Company to eligible employees in India in accordance with Payment of Gratuity Act, 1972. December 31, 2021 , 2020 and 2019 , the Company contributed $1.7 million, $1.4 million and $1.1 million, respectively, to those plans.

Note 12 - Income Taxes

Note 12 - Income Taxes	12 Months Ended
Note 12 - Income Taxes	Dec. 31, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 12. Income Taxes The Company’s geographical breakdown of income before income taxes is as follows: Year Ended December 31, 2021 2020 2019 (in thousands) Domestic $ 80,472 $ 94,099 $ 72,124 Foreign 8,925 7,938 7,859 Income before income taxes $ 89,397 $ 102,037 $ 79,983 Income tax provision consists of the following: Year Ended December 31, 2021 2020 2019 (in thousands) Current Federal $ 20,135 $ 1,944 $ (90 ) State 4,324 1,438 646 Foreign 3,701 3,571 3,000 Current income tax provision 28,160 6,953 3,556 Deferred Federal (7,342 ) 4,239 7,085 State (1,722 ) 26 447 Foreign (659 ) (753 ) (441 ) Deferred income tax provision (benefit) (9,723 ) 3,512 7,091 Income tax provision $ 18,437 $ 10,465 $ 10,647 The reconciliation of the statutory federal income tax rate to the Company’s effective tax rate is as follows: Year Ended December 31, 2021 2020 2019 Federal statutory rate 21.0 % 21.0 % 21.0 % State taxes 3.1 1.6 1.5 Stock-based compensation 10.3 4.8 4.0 Excess tax benefits related to stock-based compensation (5.4 ) (13.8 ) (11.2 ) Foreign source income 0.4 0.2 0.1 Change in valuation allowance 0.2 0.8 1.1 Foreign-derived intangible income deduction (7.0 ) (1.7 ) — Federal and state research and development credit (1.9 ) (2.6 ) (3.7 ) Other (0.1 ) — 0.4 Income tax provision 20.6 % 10.3 % 13.2 % Deferred Income Taxes Deferred income taxes reflect the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The components of the Company’s deferred tax assets and liabilities are as follows: December 31, 2021 2020 (in thousands) Deferred tax assets Research and development credit carryforwards $ 10,743 $ 16,965 Foreign tax credit carryforwards 933 3,497 Accrued liabilities 1,655 2,019 Deferred revenues 7,250 5,123 Operating lease liabilities 11,777 15,924 Intangible assets 12,377 1,397 Stock-based compensation 4,085 3,907 Other 2,987 720 Gross deferred tax assets 51,807 49,552 Valuation allowance (11,364 ) (11,188 ) Net deferred tax assets 40,443 38,364 Deferred tax liabilities Fixed assets (3,320 ) (7,017 ) Operating leases - right of use asset (9,010 ) (13,054 ) Deferred commissions (3,026 ) (2,482 ) Total deferred tax liabilities (15,356 ) (22,553 ) Net deferred tax assets $ 25,087 $ 15,811 The realization of deferred tax assets is dependent upon the generation of sufficient taxable income of the appropriate character in future periods. The Company regularly assesses the ability to realize its deferred tax assets and establishes a valuation allowance if it is more-likely than- not not not not December 31, 2021 . Additionally, due to a lack of sufficient future income of the appropriate character, certain U.S. federal and state deferred tax assets are not not December 31, 2021 and 2020 , respectively. The increase of $0.2 million in valuation allowance was mainly associated with the California research and development credit generated during the year ended December 31, 2021 that will not As of December 31, 2021 , the Company had federal net operating loss carryforwards of approximately $0.7 million available to reduce federal taxable income. The state net operating loss carryforwards are not 2022. may December 31, 2021 , the Company had $15.5 million of state research and development credit carryforwards. State research and development credits do not December 31, 2021 , the Company had foreign tax credit carryforwards of $0.9 million which begin to expire in 2028. The following table summarizes the activity related to the Company’s unrecognized tax benefits: Year Ended December 31, 2021 2020 2019 (in thousands) Unrecognized tax benefits beginning balance $ 8,855 $ 7,778 $ 6,406 Gross increase for tax positions of prior years — 4 — Gross decrease for tax positions of prior years (25 ) — (12 ) Gross increase for tax positions of current year 846 1,258 1,384 Lapse of statute of limitations — (185 ) — Total unrecognized tax benefits $ 9,676 $ 8,855 $ 7,778 The unrecognized tax benefits, if recognized, would impact the income tax provision by $4.9 million, $4.6 million and $4.2 million as of December 31, 2021 , 2020 and 2019 , respectively. The remaining amount would result in the recognition of a corresponding deferred tax asset that is then offset by a full valuation allowance. As of December 31, 2021 , the Company does not twelve not December 31, 2021 , 2020 and 2019 . The Company files income tax returns in the United States, including various state jurisdictions. The Company’s subsidiaries file tax returns in various foreign jurisdictions. The tax years 2001 2020 may As of December 31, 2021 not may

Note 13 - Segment and Geographi

Note 13 - Segment and Geographic Area Information	12 Months Ended
Note 13 - Segment and Geographic Area Information	Dec. 31, 2021
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE 13. Segment and Geographic Area Information Under ASC 280 one one Revenue by geographic area, based on the customer's billing address, is as follows: Year Ended December 31, 2021 2020 2019 (in thousands) United States $ 250,761 $ 230,444 $ 206,555 Foreign 160,411 132,519 115,052 Total revenues $ 411,172 $ 362,963 $ 321,607 Long-lived assets, which consist of Property and equipment, net and Operating leases - right of use asset, by geographic area, are as follows: December 31, 2021 2020 (in thousands) United States $ 66,440 $ 69,256 India 20,401 24,774 Rest of world 12,029 15,658 Total Long-lived Assets $ 98,870 $ 109,688

Note 14 - Net Income Per Share

Note 14 - Net Income Per Share	12 Months Ended
Note 14 - Net Income Per Share	Dec. 31, 2021
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 14. Net Income Per Share The computations for basic and diluted net income per share are as follows: Year Ended December 31, 2021 2020 2019 (in thousands, except per share data) Numerator: Net income $ 70,960 $ 91,572 $ 69,336 Denominator: Basic weighted average shares 39,030 39,167 39,075 Effect of potentially dilutive shares: Stock options 863 1,262 1,806 Restricted stock units 224 311 403 Employee stock purchase plan 1 — — Diluted weighted average shares $ 40,118 $ 40,740 $ 41,284 Net income per share: Basic $ 1.82 $ 2.34 $ 1.77 Diluted $ 1.77 $ 2.25 $ 1.68 Potentially dilutive shares not Year Ended December 31, 2021 2020 2019 (in thousands) Stock options 534 532 460 Restricted stock units 61 52 52 Total anti-dilutive shares 595 584 512

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
Significant Accounting Policies (Policies)	Dec. 31, 2021
Accounting Policies [Abstract]
Description Of Business Policy [Policy Text Block]	Description of Business Qualys, Inc. (the “Company”, “we”, “us”, “our”) was incorporated in the state of Delaware on December 30, 1999.
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation The accompanying consolidated financial statements and footnotes have been prepared in accordance with U.S. GAAP as well as the instructions to Form 10
Risk and Uncertainties, Policy [Policy Text Block]	Risks and Uncertainties In March 2020, 19 19, may may not 19 not 2022, 19 may
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of assets and liabilities at the date of the consolidated financial statements and the reported results of operations during the reporting period. The Company’s management regularly assesses these estimates, which primarily affect revenue recognition, allowance for credit loss, the valuation of goodwill and intangible assets, leases, stock-based compensation and income tax provision. Actual results could differ from those estimates and such differences may
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentration of Credit Risk The Company invests its cash and cash equivalents with major financial institutions. Cash balances with any one may not not Credit risk with respect to accounts receivable is dispersed due to the large number of customers. Collateral is not December 31, 2021 2020 no 10%
Cash, Cash Equivalents and Short-Term and Long-Term Investments Policy [Policy Text Block]	Cash, Cash Equivalents, Restricted cash and Short-Term and Long-Term Marketable Securities Cash and cash equivalents include cash held in banks, highly liquid money market funds and commercial paper, all with original maturities of three As of both December 31, 2021 2020 Cash equivalents are stated at cost, which approximates fair market value. Short-term and long-term marketable securities are classified as available-for-sale debt securities (AFS debt securities) and are carried at fair value. Unrealized gains and losses in fair value of the AFS debt securities are reported in other comprehensive income (loss). When the AFS debt securities are sold, cost is based on the specific identification method, and the realized gains and losses are included in other income (expense), net in the consolidated statements of operations. AFS debt securities are reviewed quarterly for impairment. An investment is considered impaired when its fair value is below its amortized cost. Declines in fair value from amortized cost for AFS debt securities that the company intends to sell or will more likely than not
Accounts Receivable [Policy Text Block]	Accounts Receivable Accounts receivable are recorded at the invoiced amount and do not may not December 31, 2021 2020
Securities Owned Not Readily Marketable, Policy [Policy Text Block]	Non-marketable securities In 2018, not no may not No not In 2019, fourth December 31, 2021, not no December 31, 2021.
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment, net Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which range from three five The Company purchases physical scanner appliances and other computer equipment that are provided to customers on a subscription basis. This equipment is recorded within property and equipment and the depreciation is recorded in cost of revenues over an estimated useful life of three Upon retirement or disposal, the cost of assets and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in the consolidated statements of operations. Repairs and maintenance that do not
Lessee, Leases [Policy Text Block]	Leases The Company leases certain offices, computer equipment and its data center facilities under finance leases and non-cancelable operating leases. For both operating and finance leases, we recognize a right-of-use asset, which represents our right to use the underlying asset for the lease term, and a lease liability, which represents the present value of our obligation to make payments arising over the lease term. Many of our leases include rental escalation clauses, renewal options and/or termination options that are factored into our determination of lease payments and lease terms when appropriate. The present value of the lease payments is calculated using the incremental borrowing rate of the underlying leases determined at lease commencement. As most of our leases do not Where the Company is the lessee, the Company elects to account for non-lease components associated with its leases (e.g., common area maintenance costs) and lease components separately for substantially all of its asset classes, except for data centers, for which the Company elected to combine lease and non-lease components. For leases with a term of one not In arrangements where the Company is the lessor, the Company elected to apply the practical expedient to account for lease components (e.g., customer premise equipment) and non-lease components (e.g., service revenue) as combined components as revenue under ASC 606
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of Long-Lived Assets The Company evaluates its long-lived assets, which consist of property and equipment, and intangible assets subject to amortization, for indicators of possible impairment when events or changes in circumstances indicate the carrying amount of an asset may not December 31, 2021 2020 2019
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill and Intangible Assets Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. Goodwill and indefinite-lived intangible assets are not may one In testing for a potential impairment of goodwill and the indefinite-lived intangible assets, the Company first not 50% not no December 1, 2021 2020 no
Business Combinations Policy [Policy Text Block]	Business Combinations The Company applies the provisions of ASC 805, may one
Derivatives, Reporting of Derivative Activity [Policy Text Block]	Derivative Financial Instruments Derivative financial instruments are utilized by the Company to reduce foreign currency exchange risks. The Company uses foreign currency forward contracts, with maturities of 13 first
Share-based Payment Arrangement [Policy Text Block]	Stock-Based Compensation The Company recognizes the fair value of its stock options, restricted stock units (“RSUs”) and stock purchase rights under the employee stock purchase plan (the “ESPP”) on a straight-line basis over the requisite service periods. The fair value of each stock option or stock purchase right is estimated on the date of grant using the Black-Scholes-Merton option pricing model and the fair value of each RSU is based on the Company's common stock price on the date of grant. Compensation expenses for performance-based stock options (“PSOs”) and performance-based restricted stock units (“PSUs”) are recorded based on expected achievement of the performance metrics specified in the grant, which are assessed on a quarterly basis. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture materially differs from original estimates.
Revenue [Policy Text Block]	Revenue Recognition The Company derives revenues from subscriptions that require customers to pay a fee in order to access the Company’s cloud solutions. Contract period with customers generally ranges from less than a year to five not not not The Company determines revenue recognition through the following steps: • Identification of the contract, or contracts, with a customer; • Identification of the performance obligations in the contract; • Determination of the transaction price • Allocation of the transaction price to the performance obligations in the contract; and • Recognition of revenue when, or as, the Company satisfies a performance obligation. At the inception of a customer contract, the Company makes an assessment as to that customer's ability to pay for the services provided. The Company assesses collectability based on several factors, including credit worthiness of the customer along with past transaction history. In addition, the Company performs periodic evaluations of its customers’ financial condition. Most of the Company’s revenue contracts are subscription based and contain a single performance obligation. The subscription contracts typically do not not not As the Company's cloud-based subscription services are delivered to customers electronically and over time, revenue is generally recognized ratably over the contract terms. When physical equipment is provided to the customers as part of the subscription service contract, the Company applies the practical expedient allowed under ASC 842 606, Contract modifications happen when there is an upsell, where the customers subsequently enter into contract with the Company to purchase additional product offerings or additional scans for additional devices. Contract modifications related to upsells are typically accounted for prospectively. Deferred revenues consist of customer contracts billed or cash received that will be recognized in the future under subscriptions existing at the balance sheet date. The current portion of deferred revenues represents amounts that are expected to be recognized within one Costs of shipping and handling charges incurred by the Company associated with physical scanner appliances and other computer equipment are included in cost of revenues. Sales taxes and other taxes collected from customers to be remitted to government authorities are excluded from revenues. Incremental direct costs of obtaining a contract, which consist of sales commissions primarily for new business and upsells, are deferred and amortized over the estimated life of the customer relationship if renewals are expected and the renewal commission is not one five
Advertising Cost [Policy Text Block]	Advertising Expenses Advertising costs are expensed as incurred and are included in sales and marketing expense in the consolidated statements of operations. The Company incurred advertising costs of $2.1 million, $1.6 million and $1.5 million for the years ended December 31, 2021 , 2020 and 2019 , respectively.
Income Tax, Policy [Policy Text Block]	Income Taxes The Company provides for the effect of income taxes in its consolidated financial statements using the asset and liability method which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, net operating loss carryovers, and tax credit carry forwards. The Company regularly reviews its deferred tax assets for recoverability and establishes a valuation allowance if it is more likely than not not Income tax expense or benefit is recognized for the amount of taxes payable or refundable for the current year and for deferred tax assets and liabilities for the tax consequences of events that have been recognized in an entity’s financial statements or tax returns. The Company must make significant assumptions, judgments and estimates to determine its current income tax provision (benefit), its deferred tax assets and liabilities, and any valuation allowance to be recorded against its deferred tax assets. The Company's estimates and assumptions may The Company applies a two not not 50% 12 may
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income (Loss) Other comprehensive income (loss) consists of unrealized gains (losses) on marketable securities, net of tax, and derivative financial instruments designated as cash flow hedges which are not
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currency Transactions The Company’s operations are conducted in various countries around the world and the financial statements of its foreign subsidiaries are reported in the U.S. dollar as their respective functional currency. Monetary assets and liabilities denominated in foreign currencies have been re-measured into U.S. dollars using the exchange rates in effect at the balance sheet date, and income and expenses are re-measured at average exchange rates during the period. Foreign currency re-measurement gains and losses and foreign currency transaction gains and losses are recognized in other income (expense), net.
Earnings Per Share, Policy [Policy Text Block]	Net Income Per Share Basic net income per share is computed by dividing net income by the weighted-average number of shares outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted-average number of shares outstanding plus potentially dilutive shares outstanding during the period. The potentially dilutive shares are computed by applying the treasury stock method to the Company's stock options, RSUs and the stock purchase rights under the ESPP. Any potential shares that would be anti-dilutive are excluded from the computation of diluted net income per share.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Pronouncements In December 2019, No. 2019 12, 2019 12" 740, 2019 12 December 15, 2020. 2019 12 first 2021 no Recently Issued Accounting Pronouncements Not The Company does not not

Note 2 - Fair Value of Financ_2

Note 2 - Fair Value of Financial Instruments (Tables)	12 Months Ended
Note 2 - Fair Value of Financial Instruments (Tables)	Dec. 31, 2021
Notes Tables
Cash and Cash Equivalents and Debt Securities, Available-for-sale, Amortized Cost to Fair Value [Table Text Block]	December 31, 2021 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) Cash and cash equivalents: Cash $ 61,220 $ — $ — $ 61,220 Money market funds 75,258 — — 75,258 Commercial paper 850 — — 850 Total 137,328 — — 137,328 Short-term marketable securities: Commercial paper 28,869 101 (7 ) 28,963 Corporate bonds 3,952 — — 3,952 Asset-backed securities 217,160 2 (163 ) 216,999 U.S. Treasury and government agencies 18,046 — — 18,046 Total 268,027 103 (170 ) 267,960 Long-term marketable securities: Asset-backed securities 14,941 6 (36 ) 14,911 U.S. Treasury and government agencies 37,664 — (136 ) 37,528 Foreign government 1,007 12 — 1,019 Corporate bonds 57,762 160 (182 ) 57,740 Total 111,374 178 (354 ) 111,198 Total $ 516,729 $ 281 $ (524 ) $ 516,486 December 31, 2020 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) Cash and cash equivalents: Cash $ 33,105 $ — $ — $ 33,105 Money market funds 38,028 — — 38,028 Commercial paper 2,999 — — 2,999 Total 74,132 — — 74,132 Short-term marketable securities: Commercial paper 6,147 — — 6,147 Corporate bonds 24,368 170 — 24,538 Asset-backed securities 6,263 18 — 6,281 U.S. Treasury and government agencies 244,568 369 (11 ) 244,926 Total 281,346 557 (11 ) 281,892 Long-term marketable securities: Asset-backed securities 38,456 160 (3 ) 38,613 U.S. Treasury and government agencies 6,884 17 — 6,901 Foreign government 1,006 31 — 1,037 Corporate bonds 51,068 839 — 51,907 Total 97,414 1,047 (3 ) 98,458 Total $ 452,892 $ 1,604 $ (14 ) $ 454,482
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	December 31, 2021 Level 1 Level 2 Fair Value (in thousands) Money market funds $ 75,258 $ — $ 75,258 Commercial paper — 18,896 18,896 U.S. Treasury and government agencies — 254,527 254,527 Foreign government — 1,019 1,019 Corporate bonds — 86,703 86,703 Asset-backed securities — 18,863 18,863 Total $ 75,258 $ 380,008 $ 455,266 December 31, 2020 Level 1 Level 2 Fair Value (in thousands) Money market funds $ 38,028 $ — $ 38,028 Commercial paper — 9,146 9,146 U.S. Treasury and government agencies — 251,827 251,827 Foreign government — 1,037 1,037 Corporate bonds — 76,445 76,445 Asset-backed securities — 44,894 44,894 Total $ 38,028 $ 383,349 $ 421,377
Investments Classified by Contractual Maturity Date [Table Text Block]	December 31, 2021 Mature within One Year Mature after One Year through Two Years Mature over Two Years Fair Value (in thousands) Commercial paper $ 18,896 $ — $ — $ 18,896 U.S. Treasury and government agencies 216,999 37,528 — 254,527 Foreign government — 1,019 — 1,019 Corporate bonds 28,964 38,407 19,332 86,703 Asset-backed securities 3,951 7,959 6,953 18,863 Total $ 268,810 $ 84,913 $ 26,285 $ 380,008
Schedule of Derivative Instruments [Table Text Block]	December 31, 2021 2020 (in thousands) Assets Foreign currency forward contracts designated as cash flow hedge $ 1,737 $ 511 Foreign currency forward contracts not designated as hedging instruments 1,599 27 Total $ 3,336 $ 538 Liabilities Foreign currency forward contracts designated as cash flow hedge $ (181 ) $ (2,200 ) Foreign currency forward contracts not designated as hedging instruments (207 ) (1,677 ) Total $ (388 ) $ (3,877 )
Derivative Instruments, Gain (Loss) [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) Net gains (losses) from non-designated forward contracts $ 2,452 $ (1,634 ) $ 438 Other foreign currency transactions gains (losses) (2,749 ) 1,894 (792 ) Total foreign exchange gains (losses), net (297 ) 260 (354 ) Other expenses (276 ) (253 ) (253 ) Other income (expense), net $ (573 ) $ 7 $ (607 )

Note 3 - Accumulated Other Co_2

Note 3 - Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Available-for-sale debt securities Cash flow hedges Total (in thousands) Balances at December 31, 2018 $ (545 ) $ (41 ) $ (586 ) Change in unrealized gains during the period 1,610 651 2,261 Net gains reclassified into income during the period — (169 ) (169 ) Income tax provision (243 ) (101 ) (344 ) Net change during the period 1,367 381 1,748 Balances at December 31, 2019 822 340 1,162 Change in unrealized gains (losses) during the period 549 (2,099 ) (1,550 ) Net gains reclassified into income during the period (25 ) (564 ) (589 ) Income tax benefit (provision) (122 ) 615 493 Net change during the period 402 (2,048 ) (1,646 ) Balances at December 31, 2020 1,224 (1,708 ) (484 ) Change in unrealized gains (losses) during the period (1,854 ) 2,837 983 Net losses reclassified into income during the period 22 933 955 Income tax benefit (provision) 423 (870 ) (447 ) Net change during the period (1,409 ) 2,900 1,491 Balances at December 31, 2021 $ (185 ) $ 1,192 $ 1,007
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) Reclassification of AOCI - Available-for-sale debt securities Other income (expense), net $ (22 ) $ 25 $ — Reclassification of AOCI - Cash flow hedges Revenues $ (1,667 ) $ 960 $ 169 Cost of revenues 149 (76 ) — Research and development 492 (264 ) — Sales and marketing 28 (20 ) — General and administrative 65 (36 ) — Total $ (933 ) $ 564 $ 169

Note 4 - Property and Equipme_2

Note 4 - Property and Equipment, Net (Tables)	12 Months Ended
Note 4 - Property and Equipment, Net (Tables)	Dec. 31, 2021
Notes Tables
Property, Plant and Equipment [Table Text Block]	December 31, 2021 2020 (in thousands) Computer equipment $ 161,809 $ 136,286 Computer software 25,807 26,164 Leasehold improvements 21,092 21,107 Scanner appliances 16,510 16,749 Furniture, fixtures and equipment 6,479 6,599 Finance leases - right of use asset — 3,503 Total property and equipment 231,697 210,408 Less: accumulated depreciation and amortization (169,843 ) (145,558 ) Property and equipment, net $ 61,854 $ 64,850

Note 5 - Revenue from Contrac_2

Note 5 - Revenue from Contracts with Customers (Tables)	12 Months Ended
Note 5 - Revenue from Contracts with Customers (Tables)	Dec. 31, 2021
Notes Tables
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	(in thousands) 2022 $ 142,812 2023 101,482 2024 36,361 2025 2,422 2026 499 2027 and thereafter 110 Total $ 283,687
Disaggregation of Revenue [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) Direct $ 242,709 $ 212,296 $ 186,130 Partner 168,463 150,667 135,477 Total $ 411,172 $ 362,963 $ 321,607
Contract With Customer, Commission Asset Balances [Table Text Block]	December 31, 2021 2020 (in thousands) Current $ 4,223 $ 3,459 Noncurrent $ 8,391 $ 6,906

Note 6 - Acquisitions (Tables)

Note 6 - Acquisitions (Tables)	12 Months Ended
Note 6 - Acquisitions (Tables)	Dec. 31, 2021
Notes Tables
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	Acquiree Acquisition Date Purchase Consideration Purchased Intangible Assets Goodwill (in thousands) TotalCloud August 19, 2021 $ 1,200 $ 1,200 $ — Spell security July 24, 2020 $ 1,500 $ 1,500 $ — Adya January 10, 2019 $ 1,000 $ 900 $ 100

Note 7 - Intangible Assets, N_2

Note 7 - Intangible Assets, Net (Tables)	12 Months Ended
Note 7 - Intangible Assets, Net (Tables)	Dec. 31, 2021
Notes Tables
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]	December 31, 2021 (in thousands) Weighted Average Life (Years) Weighted Average Remaining Life (Years) Cost Accumulated Amortization Net Book Value Developed technology 4.5 0.9 $ 28,556 $ (22,463 ) $ 6,093 Patent licenses 14.0 2.7 1,387 (1,121 ) 266 Non-compete agreements 2.0 0.6 500 (354 ) 146 Total intangibles subject to amortization $ 30,443 $ (23,938 ) 6,505 Intangible assets not subject to amortization 40 Total intangible assets, net $ 6,545 December 31, 2020 (in thousands) Weighted Average Life (Years) Weighted Average Remaining Life (Years) Cost Accumulated Amortization Net Book Value Developed technology 4.4 1.8 $ 27,356 $ (16,152 ) $ 11,204 Patent licenses 14.0 3.7 1,387 (1,021 ) 366 Non-compete agreements 2.0 1.6 500 (104 ) 396 Total intangibles subject to amortization $ 29,243 $ (17,277 ) 11,966 Intangible assets not subject to amortization 40 Total intangible assets, net $ 12,006
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	(in thousands) 2022 $ 5,063 2023 590 2024 452 2025 240 2026 160 Total expected future amortization expense $ 6,505

Note 8 - Leases (Tables)

Note 8 - Leases (Tables)	12 Months Ended
Note 8 - Leases (Tables)	Dec. 31, 2021
Notes Tables
Lessee, Operating Lease, Supplemental Cash Flow Disclosure [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) Cash payments included in the measurement of lease liabilities $ 14,646 $ 13,403 $ 9,372 Lease liabilities arising from obtaining right-of-use assets $ 4,110 $ 15,837 $ 17,359
Lessee, Weighted Average Remaining Lease Term and Weighted Average Discount Rate [Table Text Block]	December 31, 2021 2020 Weighted average remaining lease term (years) 3.3 4.1 Weighted average discount rate 4.8 % 4.8 %
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	(in thousands) 2022 $ 14,543 2023 12,042 2024 10,735 2025 6,536 2026 4,498 2027 and thereafter 5,819 Total minimum lease payments 54,173 Less: interest (5,651 ) Present value of net minimum lease payments 48,522 Less: lease liabilities, current (12,608 ) Lease liabilities, noncurrent $ 35,914

Note 9 - Commitment and Conti_2

Note 9 - Commitment and Contingencies (Tables)	12 Months Ended
Note 9 - Commitment and Contingencies (Tables)	Dec. 31, 2021
Notes Tables
Contractual Obligation, Fiscal Year Maturity [Table Text Block]	(in thousands) 2022 $ 23,672 2023 11,488 2024 7,599 2025 936 Total purchase commitments $ 43,695

Note 10 - Stockholders' Equit_2

Note 10 - Stockholders' Equity and Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) Cost of revenues $ 3,782 $ 2,767 $ 2,262 Research and development 10,750 13,502 11,151 Sales and marketing 6,323 5,785 4,984 General and administrative 46,724 17,981 16,495 Total stock-based compensation $ 67,579 $ 40,035 $ 34,892
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Year Ended December 31, 2021 2020 2019 Expected term (in years) 5.2 to 5.5 4.5 to 5.5 4.4 to 6.6 Volatility 38% to 41 % 38% to 43 % 40% to 46 % Risk-free interest rate 0.5% to 1.2 % 0.3% to 1.4 % 1.5% to 2.4 % Dividend yield — — —
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Outstanding Options Weighted Average Exercise Price Weighted Average Remaining Contractual Life Aggregate Intrinsic Value (in thousands) (Years) (in thousands) Balance as of December 31, 2020 2,215 $ 59.07 6.5 $ 139,121 Granted 495 $ 112.43 Exercised (725 ) (1) $ 68.91 Canceled (147 ) $ 102.92 Balance as of December 31, 2021 1,838 $ 66.05 6.0 $ 130,791 Vested and expected to vest - December 31, 2021 1,659 $ 61.43 5.7 $ 125,769 Exercisable - December 31, 2021 1,168 $ 42.60 4.3 $ 110,495
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Outstanding RSUs Weighted Average Grant Date Fair Value (in thousands) Balance as of December 31, 2020 1,047 $ 86.78 Granted 583 (1) $ 114.59 Vested (530 ) (2) $ 84.97 Canceled (183 ) $ 90.42 Balance as of December 31, 2021 917 (3) $ 104.78 Outstanding and expected to vest - December 31, 2021 815 $ 104.22
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Year Ended December 31, 2021 Expected term (in years) 0.5 Volatility 34 % Risk-free interest rate 0.1 % Dividend yield —
Share Repurchase Program [Table Text Block]	Announcement Date Authorized Dollar Value (in millions) February 12, 2018 $ 100.0 October 30, 2018 100.0 October 30, 2019 100.0 May 7, 2020 100.0 February 10, 2021 100.0 November 3, 2021 200.0 Total as of December 31, 2021 $ 700.0

Note 12 - Income Taxes (Tables)

Note 12 - Income Taxes (Tables)	12 Months Ended
Note 12 - Income Taxes (Tables)	Dec. 31, 2021
Notes Tables
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) Domestic $ 80,472 $ 94,099 $ 72,124 Foreign 8,925 7,938 7,859 Income before income taxes $ 89,397 $ 102,037 $ 79,983
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) Current Federal $ 20,135 $ 1,944 $ (90 ) State 4,324 1,438 646 Foreign 3,701 3,571 3,000 Current income tax provision 28,160 6,953 3,556 Deferred Federal (7,342 ) 4,239 7,085 State (1,722 ) 26 447 Foreign (659 ) (753 ) (441 ) Deferred income tax provision (benefit) (9,723 ) 3,512 7,091 Income tax provision $ 18,437 $ 10,465 $ 10,647
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Year Ended December 31, 2021 2020 2019 Federal statutory rate 21.0 % 21.0 % 21.0 % State taxes 3.1 1.6 1.5 Stock-based compensation 10.3 4.8 4.0 Excess tax benefits related to stock-based compensation (5.4 ) (13.8 ) (11.2 ) Foreign source income 0.4 0.2 0.1 Change in valuation allowance 0.2 0.8 1.1 Foreign-derived intangible income deduction (7.0 ) (1.7 ) — Federal and state research and development credit (1.9 ) (2.6 ) (3.7 ) Other (0.1 ) — 0.4 Income tax provision 20.6 % 10.3 % 13.2 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 2021 2020 (in thousands) Deferred tax assets Research and development credit carryforwards $ 10,743 $ 16,965 Foreign tax credit carryforwards 933 3,497 Accrued liabilities 1,655 2,019 Deferred revenues 7,250 5,123 Operating lease liabilities 11,777 15,924 Intangible assets 12,377 1,397 Stock-based compensation 4,085 3,907 Other 2,987 720 Gross deferred tax assets 51,807 49,552 Valuation allowance (11,364 ) (11,188 ) Net deferred tax assets 40,443 38,364 Deferred tax liabilities Fixed assets (3,320 ) (7,017 ) Operating leases - right of use asset (9,010 ) (13,054 ) Deferred commissions (3,026 ) (2,482 ) Total deferred tax liabilities (15,356 ) (22,553 ) Net deferred tax assets $ 25,087 $ 15,811
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) Unrecognized tax benefits beginning balance $ 8,855 $ 7,778 $ 6,406 Gross increase for tax positions of prior years — 4 — Gross decrease for tax positions of prior years (25 ) — (12 ) Gross increase for tax positions of current year 846 1,258 1,384 Lapse of statute of limitations — (185 ) — Total unrecognized tax benefits $ 9,676 $ 8,855 $ 7,778

Note 13 - Segment and Geograp_2

Note 13 - Segment and Geographic Area Information (Tables)	12 Months Ended
Note 13 - Segment and Geographic Area Information (Tables)	Dec. 31, 2021
Notes Tables
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) United States $ 250,761 $ 230,444 $ 206,555 Foreign 160,411 132,519 115,052 Total revenues $ 411,172 $ 362,963 $ 321,607 December 31, 2021 2020 (in thousands) United States $ 66,440 $ 69,256 India 20,401 24,774 Rest of world 12,029 15,658 Total Long-lived Assets $ 98,870 $ 109,688

Note 14 - Net Income Per Share

Note 14 - Net Income Per Share (Tables)	12 Months Ended
Note 14 - Net Income Per Share (Tables)	Dec. 31, 2021
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands, except per share data) Numerator: Net income $ 70,960 $ 91,572 $ 69,336 Denominator: Basic weighted average shares 39,030 39,167 39,075 Effect of potentially dilutive shares: Stock options 863 1,262 1,806 Restricted stock units 224 311 403 Employee stock purchase plan 1 — — Diluted weighted average shares $ 40,118 $ 40,740 $ 41,284 Net income per share: Basic $ 1.82 $ 2.34 $ 1.77 Diluted $ 1.77 $ 2.25 $ 1.68
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Year Ended December 31, 2021 2020 2019 (in thousands) Stock options 534 532 460 Restricted stock units 61 52 52 Total anti-dilutive shares 595 584 512

Note 1 - The Company and Summ_2

Note 1 - The Company and Summary of Significant Accounting Policies (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Restricted Cash, Total	$ 1,200	$ 1,200
Proceeds from Dividends Received	0
Payments for Advance to Affiliate			$ 600
Impairment, Long-Lived Asset, Held-for-Use, Total	$ 0	0	0
Number of Reporting Units	1
Capitalized Contract Cost, Amortization Period (Year)	5 years
Advertising Expense	$ 2,100	$ 1,600	$ 1,500
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Preferred Stock [Member]
Investments, Total				$ 2,500
Other than Temporary Impairment Losses, Investments, Total				$ 0

Note 2 - Fair Value of Financ_3

Note 2 - Fair Value of Financial Instruments (Details Textual) Pure in Thousands, € in Millions, ₨ in Millions, £ in Millions, SFr in Millions, $ in Millions, $ in Millions	Dec. 31, 2021USD ($)	Dec. 31, 2021EUR (€)	Dec. 31, 2021GBP (£)	Dec. 31, 2021INR (₨)	Dec. 31, 2021CAD ($)	Dec. 31, 2021CHF (SFr)	Dec. 31, 2020EUR (€)	Dec. 31, 2020GBP (£)	Dec. 31, 2020INR (₨)
Marketable Securities In Unrealized Loss Positions, More Than 12 Months Qualitative Disclosure, Number Of Positions	0	0	0	0	0	0	0	0	0
Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member]
Derivative, Notional Amount		€ 29.8	£ 9.4	₨ 2,955.3			€ 25.9	£ 8.7	₨ 1,933.5
Foreign Exchange Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative, Notional Amount		€ 34.5	£ 11.6	₨ 74.9	$ 2.5	SFr 1	€ 17.7	£ 6.5	₨ 32.8
Foreign Exchange Contracts for GBP and Euro [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member]
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	$ 1
Foreign Exchange Contracts for INR [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member]
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	$ 0.3

Note 2 - Fair Value of Financ_4

Note 2 - Fair Value of Financial Instruments - Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 137,328	$ 74,132
Short-term marketable securities, amortization cost	268,027	281,346
Unrealized gains, short-term securities	103	557
Short-term marketable securities, unrealized loss	(170)	(11)
Short-term marketable securities	267,960	281,892
Long-term marketable securities, amortization cost	111,374	97,414
Unrealized gains, long-term securities	178	1,047
Long-term marketable securities, unrealized loss	(354)	(3)
Long-term marketable securities	111,198	98,458
Cash and cash equivalents and marketable securities, amortization cost	516,729	452,892
Unrealized gains, securities	281	1,604
Unrealized loss, securities	(524)	(14)
Cash and cash equivalents and short-term and long-term Marketable Securities, fair value	516,486	454,482
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Short-term marketable securities, amortization cost	28,869	6,147
Unrealized gains, short-term securities	101	0
Short-term marketable securities, unrealized loss	(7)	0
Short-term marketable securities	28,963	6,147
Corporate Debt Securities [Member]
Short-term marketable securities, amortization cost	3,952	24,368
Unrealized gains, short-term securities	0	170
Short-term marketable securities, unrealized loss	0	0
Short-term marketable securities	3,952	24,538
Long-term marketable securities, amortization cost	57,762	51,068
Unrealized gains, long-term securities	160	839
Long-term marketable securities, unrealized loss	(182)	0
Long-term marketable securities	57,740	51,907
Asset-backed Securities [Member]
Short-term marketable securities, amortization cost	217,160	6,263
Unrealized gains, short-term securities	2	18
Short-term marketable securities, unrealized loss	(163)	0
Short-term marketable securities	216,999	6,281
Long-term marketable securities, amortization cost	14,941	38,456
Unrealized gains, long-term securities	6	160
Long-term marketable securities, unrealized loss	(36)	(3)
Long-term marketable securities	14,911	38,613
US Government Agencies Debt Securities [Member]
Short-term marketable securities, amortization cost	18,046	244,568
Unrealized gains, short-term securities	0	369
Short-term marketable securities, unrealized loss	0	(11)
Short-term marketable securities	18,046	244,926
Long-term marketable securities, amortization cost	37,664	6,884
Unrealized gains, long-term securities	0	17
Long-term marketable securities, unrealized loss	(136)	0
Long-term marketable securities	37,528	6,901
Foreign Government Agencies [Member]
Long-term marketable securities, amortization cost	1,007	1,006
Unrealized gains, long-term securities	12	31
Long-term marketable securities, unrealized loss	0	0
Long-term marketable securities	1,019	1,037
Cash [Member]
Cash and cash equivalents	61,220	33,105
Money Market Funds [Member]
Cash and cash equivalents	75,258	38,028
Commercial Paper [Member]
Cash and cash equivalents	$ 850	$ 2,999

Note 2 - Fair Value of Financ_5

Note 2 - Fair Value of Financial Instruments - Fair Value Hierarchy (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Money market funds	$ 75,258	$ 38,028
Commercial paper	18,896	9,146
U.S. Treasury and government agencies	254,527	251,827
Foreign government	1,019	1,037
Corporate bonds	86,703	76,445
Asset-backed securities	18,863	44,894
Total	455,266	421,377
Fair Value, Inputs, Level 1 [Member]
Money market funds	75,258	38,028
Commercial paper	0	0
U.S. Treasury and government agencies	0	0
Foreign government	0	0
Corporate bonds	0	0
Asset-backed securities	0	0
Total	75,258	38,028
Fair Value, Inputs, Level 2 [Member]
Money market funds	0	0
Commercial paper	18,896	9,146
U.S. Treasury and government agencies	254,527	251,827
Foreign government	1,019	1,037
Corporate bonds	86,703	76,445
Asset-backed securities	18,863	44,894
Total	$ 380,008	$ 383,349

Note 2 - Fair Value of Financ_6

Note 2 - Fair Value of Financial Instruments - Summary of the Fair Value of Marketable Securities (Details) $ in Thousands	Dec. 31, 2021USD ($)
Available-for-sale Securities, Debt and Equity Maturities, Next Twelve Months, Fair Value	$ 268,810
Available-for-sale Securities, Debt and Equity Maturities, Year One through Two, Fair Value	84,913
Available-for-sale Securities, Debt and Equity Maturities, Year over two years, Fair Value	26,285
Debt Securities, Available-for-sale	380,008
Commercial Paper [Member]
Available-for-sale Securities, Debt and Equity Maturities, Next Twelve Months, Fair Value	18,896
Available-for-sale Securities, Debt and Equity Maturities, Year One through Two, Fair Value	0
Available-for-sale Securities, Debt and Equity Maturities, Year over two years, Fair Value	0
Debt Securities, Available-for-sale	18,896
US Government Agencies Debt Securities [Member]
Available-for-sale Securities, Debt and Equity Maturities, Next Twelve Months, Fair Value	216,999
Available-for-sale Securities, Debt and Equity Maturities, Year One through Two, Fair Value	37,528
Available-for-sale Securities, Debt and Equity Maturities, Year over two years, Fair Value	0
Debt Securities, Available-for-sale	254,527
Foreign Government Agencies [Member]
Available-for-sale Securities, Debt and Equity Maturities, Next Twelve Months, Fair Value	0
Available-for-sale Securities, Debt and Equity Maturities, Year One through Two, Fair Value	1,019
Available-for-sale Securities, Debt and Equity Maturities, Year over two years, Fair Value	0
Debt Securities, Available-for-sale	1,019
Corporate Bond Securities [Member]
Available-for-sale Securities, Debt and Equity Maturities, Next Twelve Months, Fair Value	28,964
Available-for-sale Securities, Debt and Equity Maturities, Year One through Two, Fair Value	38,407
Available-for-sale Securities, Debt and Equity Maturities, Year over two years, Fair Value	19,332
Debt Securities, Available-for-sale	86,703
Asset-backed Securities [Member]
Available-for-sale Securities, Debt and Equity Maturities, Next Twelve Months, Fair Value	3,951
Available-for-sale Securities, Debt and Equity Maturities, Year One through Two, Fair Value	7,959
Available-for-sale Securities, Debt and Equity Maturities, Year over two years, Fair Value	6,953
Debt Securities, Available-for-sale	$ 18,863

Note 2 - Fair Value of Financ_7

Note 2 - Fair Value of Financial Instruments - Summary of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Foreign currency forward contracts	$ 3,336	$ 538
Foreign currency forward contracts	(388)	(3,877)
Designated as Hedging Instrument [Member]
Foreign currency forward contracts	1,737	511
Foreign currency forward contracts	(181)	(2,200)
Not Designated as Hedging Instrument [Member]
Foreign currency forward contracts	1,599	27
Foreign currency forward contracts	$ (207)	$ (1,677)

Note 2 - Fair Value of Financ_8

Note 2 - Fair Value of Financial Instruments - Amounts Recognized In Statement Of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net gains (losses) from non-designated forward contracts	$ 2,452	$ (1,634)	$ 438
Other foreign currency transactions gains (losses)	(2,749)	1,894	(792)
Total foreign exchange gains (losses), net	(297)	260	(354)
Other expenses	(276)	(253)	(253)
Other income (expense), net	$ (573)	$ 7	$ (607)

Note 3 - Accumulated Other Co_3

Note 3 - Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance	$ 404,482	$ 386,803	$ 357,989
Other comprehensive income (loss), net of tax	1,491	(1,646)	1,748
Balance	436,714	404,482	386,803
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	1,224	822	(545)
Change in unrealized gains during the period	(1,854)	549	1,610
Net losses reclassified into income during the period	22	(25)	0
Income tax provision	423	(122)	(243)
Other comprehensive income (loss), net of tax	(1,409)	402	1,367
Balance	(185)	1,224	822
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	(1,708)	340	(41)
Change in unrealized gains during the period	2,837	(2,099)	651
Net losses reclassified into income during the period	933	(564)	(169)
Income tax provision	(870)	615	(101)
Other comprehensive income (loss), net of tax	2,900	(2,048)	381
Balance	1,192	(1,708)	340
AOCI Attributable to Parent [Member]
Balance	(484)	1,162	(586)
Change in unrealized gains during the period	983	(1,550)	2,261
Net losses reclassified into income during the period	955	(589)	(169)
Income tax provision	(447)	493	(344)
Other comprehensive income (loss), net of tax	1,491	(1,646)	1,748
Balance	$ 1,007	$ (484)	$ 1,162

Note 3 - Accumulated Other Co_4

Note 3 - Accumulated Other Comprehensive Income (Loss) - Amounts Reclassified from AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other income (expense), net	$ 573	$ (7)	$ 607
Revenues	411,172	362,963	321,607
Cost of revenues	89,439	79,226	69,517
Research and development	81,289	72,548	68,239
Sales and marketing	76,487	67,965	70,833
General and administrative	76,274	46,570	40,765
Reclassification out of Accumulated Other Comprehensive Income [Member] \| AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Other income (expense), net	(22)	25	0
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Revenues	(1,667)	960	169
Cost of revenues	149	(76)	0
Research and development	492	(264)	0
Sales and marketing	28	(20)	0
General and administrative	65	(36)	0
Total	$ (933)	$ 564	$ 169

Note 4 - Property and Equipme_3

Note 4 - Property and Equipment, Net (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment, Net, Ending Balance	$ 61,854	$ 64,850
Depreciation, Depletion And Amortization, Excluding Intangible Asset Amortization	28,500	26,100	$ 24,900
Scanner Appliances and Other Computer Equipment Subject To Subscription [Member]
Property, Plant and Equipment, Net, Ending Balance	5,300	7,500
Scanner Appliances and Other Computer Equipment Not Placed In Service [Member]
Property, Plant and Equipment, Net, Ending Balance	$ 1,300	$ 1,900

Note 4 - Property and Equipme_4

Note 4 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property and equipment and finance lease	$ 231,697	$ 210,408
Less: accumulated depreciation and amortization	(169,843)	(145,558)
Property and equipment and finance lease, net	61,854	64,850
Computer Equipment [Member]
Property and equipment and finance lease	161,809	136,286
Computer Software, Intangible Asset [Member]
Property and equipment and finance lease	25,807	26,164
Leasehold Improvements [Member]
Property and equipment and finance lease	21,092	21,107
Scanner Appliances [Member]
Property and equipment and finance lease	16,510	16,749
Furniture and Fixtures [Member]
Property and equipment and finance lease	6,479	6,599
Assets Held under Capital Leases [Member]
Property and equipment and finance lease	$ 0	$ 3,503

Note 5 - Revenue from Contrac_3

Note 5 - Revenue from Contracts with Customers (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Contract with Customer, Liability, Revenue Recognized	$ 211,000	$ 188,600
Amortization of Deferred Sales Commissions	4,000	3,000	$ 2,000
Capitalized Contract Cost, Impairment Loss	$ 0	$ 0	$ 0

Note 5 - Revenue from Contrac_4

Note 5 - Revenue from Contracts with Customers - Expected Revenue from All Remaining Performance Obligations (Details) $ in Thousands	Dec. 31, 2021USD ($)
Remaining performance obligations	$ 283,687

Note 5 - Revenue from Contrac_5

Note 5 - Revenue from Contracts with Customers - Expected Revenue from All Remaining Performance Obligations 2 (Details) $ in Thousands	Dec. 31, 2021USD ($)
Remaining performance obligations	$ 283,687
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Remaining performance obligations, period (Year)	1 year
Remaining performance obligations	$ 142,812
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Remaining performance obligations, period (Year)	1 year
Remaining performance obligations	$ 101,482
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Remaining performance obligations, period (Year)	1 year
Remaining performance obligations	$ 36,361
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Remaining performance obligations, period (Year)	1 year
Remaining performance obligations	$ 2,422
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Remaining performance obligations, period (Year)	1 year
Remaining performance obligations	$ 499
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Remaining performance obligations, period (Year)	1 year
Remaining performance obligations	$ 110

Note 5 - Revenue from Contrac_6

Note 5 - Revenue from Contracts with Customers - Revenue by Sales Channel (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 411,172	$ 362,963	$ 321,607
Sales Channel, Directly to Consumer [Member]
Revenues	242,709	212,296	186,130
Sales Channel, Through Intermediary [Member]
Revenues	$ 168,463	$ 150,667	$ 135,477

Note 5 - Revenue from Contrac_7

Note 5 - Revenue from Contracts with Customers - Capitalized Cost to Obtain Contracts, Current and Noncurrent (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current	$ 4,223	$ 3,459
Noncurrent	$ 8,391	$ 6,906

Note 6 - Acquisitions (Details

Note 6 - Acquisitions (Details Textual) - USD ($) $ in Millions	Aug. 19, 2022	Aug. 19, 2021	Jul. 24, 2020	Jan. 10, 2019	Dec. 31, 2021	Dec. 31, 2020
Spell Security [Member]
Business Combination, Consideration Transferred, Total			$ 1.5
Business Combination, Contingent Consideration, Liability, Total			0.2
Adya [Member]
Business Combination, Consideration Transferred, Total				$ 1
Payment for Contingent Consideration Liability, Investing Activities				$ 0.2
Goodwill, Deductible for Tax Purpose Period (Year)				15 years
Developed Technology Rights [Member]
Finite-lived Intangible Assets Acquired		$ 1.2
Payments to Acquire Intangible Assets		$ 1.1	1.3
Finite-Lived Intangible Asset, Useful Life (Year)		5 years			4 years 6 months	4 years 4 months 24 days
Developed Technology Rights [Member] \| Spell Security [Member]
Finite-lived Intangible Assets Acquired			$ 1
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)			4 years
Developed Technology Rights [Member] \| Adya [Member]
Finite-Lived Intangible Asset, Useful Life (Year)				4 years
Developed Technology Rights [Member] \| Forecast [Member]
Payments to Acquire Intangible Assets	$ 0.1
Noncompete Agreements [Member]
Finite-Lived Intangible Asset, Useful Life (Year)					2 years	2 years
Noncompete Agreements [Member] \| Spell Security [Member]
Finite-lived Intangible Assets Acquired			$ 0.5
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)			2 years

Note 6 - Acquisitions - Estimat

Note 6 - Acquisitions - Estimated Fair Values of the Acquired Assets (Details) - USD ($) $ in Thousands	Aug. 19, 2021	Jul. 24, 2020	Jan. 10, 2019	Dec. 31, 2021	Dec. 31, 2020
Goodwill				$ 7,447	$ 7,447
Total Cloud [Member]
Purchase Consideration	$ 1,200
Purchased Intangible Assets	1,200
Goodwill	$ 0
Spell Security [Member]
Purchase Consideration		$ 1,500
Purchased Intangible Assets		1,500
Goodwill		$ 0
Adya [Member]
Purchase Consideration			$ 1,000
Purchased Intangible Assets			900
Goodwill			$ 100

Note 7 - Intangible Assets, N_3

Note 7 - Intangible Assets, Net (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amortization of Intangible Assets, Total	$ 6.7	$ 6.3	$ 6.1

Note 7 - Intangible Assets, N_4

Note 7 - Intangible Assets, Net - Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Aug. 19, 2021	Dec. 31, 2021	Dec. 31, 2020
Cost		$ 30,443	$ 29,243
Amortization of intangible assets		(23,938)	(17,277)
Net Book Value		6,505	11,966
Total intangible assets, net		6,545	12,006
Intangible Assets Not Subject to Amortization [Member]
Intangible assets not subject to amortization		$ 40	$ 40
Developed Technology Rights [Member]
Weighted Average Life (Year)	5 years	4 years 6 months	4 years 4 months 24 days
Weighted Average Remaining Life (Year)		10 months 24 days	1 year 9 months 18 days
Cost		$ 28,556	$ 27,356
Amortization of intangible assets		(22,463)	(16,152)
Net Book Value		$ 6,093	$ 11,204
Patents [Member]
Weighted Average Life (Year)		14 years	14 years
Weighted Average Remaining Life (Year)		2 years 8 months 12 days	3 years 8 months 12 days
Cost		$ 1,387	$ 1,387
Amortization of intangible assets		(1,121)	(1,021)
Net Book Value		$ 266	$ 366
Noncompete Agreements [Member]
Weighted Average Life (Year)		2 years	2 years
Weighted Average Remaining Life (Year)		7 months 6 days	1 year 7 months 6 days
Cost		$ 500	$ 500
Amortization of intangible assets		(354)	(104)
Net Book Value		$ 146	$ 396

Note 7 - Intangible Assets, N_5

Note 7 - Intangible Assets, Net - Expected Amortization Expense in Future Periods (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
2022	$ 5,063
2023	590
2024	452
2025	240
2026	160
Total expected future amortization expense	$ 6,505	$ 11,966

Note 8 - Leases (Details Textua

Note 8 - Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
Note 8 - Leases (Details Textual) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Lease, Expense	$ 16.8	$ 16.7	$ 13.9

Note 8 - Leases - Supplemental

Note 8 - Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash payments included in the measurement of lease liabilities	$ 14,646	$ 13,403	$ 9,372
Lease liabilities arising from obtaining right-of-use assets	$ 4,110	$ 15,837	$ 17,359

Note 8 - Leases - Weighted Aver

Note 8 - Leases - Weighted Average Remaining Lease Term and Weighted Average Discount Rate (Details)	Dec. 31, 2021	Dec. 31, 2020
Weighted average remaining lease term (Year)	3 years 3 months 18 days	4 years 1 month 6 days
Weighted average discount rate	4.80%	4.80%

Note 8 - Leases - Minimum Annua

Note 8 - Leases - Minimum Annual Lease Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
2022, operating leases	$ 14,543
2023, operating leases	12,042
2024, operating leases	10,735
2025, operating leases	6,536
2026, operating leases	4,498
2025 and thereafter, operating leases	5,819
Total minimum lease payments, operating leases	54,173
Less: interest	(5,651)
Present value of net minimum lease payments	48,522
Less: lease liabilities, current	(12,608)	$ (11,672)
Lease liabilities, noncurrent	$ 35,914	$ 45,700

Note 9 - Commitment and Conti_3

Note 9 - Commitment and Contingencies - Remaining Purchase Commitments (Details) $ in Thousands	Dec. 31, 2021USD ($)
2022	$ 23,672
2023	11,488
2024	7,599
2025	936
Total purchase commitments	$ 43,695

Note 10 - Stockholders' Equit_3

Note 10 - Stockholders' Equity and Stock-based Compensation (Details Textual) $ / shares in Units, $ in Thousands		Oct. 28, 2021shares	Jun. 09, 2021shares	Apr. 27, 2021shares	Mar. 19, 2021shares	Dec. 10, 2020shares	Nov. 02, 2019shares	Dec. 21, 2018shares	Feb. 28, 2021shares	Feb. 29, 2020shares	Dec. 31, 2021USD ($)$ / sharesshares	Dec. 31, 2020USD ($)$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018shares	Oct. 03, 2012$ / sharesshares
Preferred Stock, Shares Authorized (in shares)											20,000,000	20,000,000			20,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) \| $ / shares											$ 0.001	$ 0.001			$ 0.001
Preferred Stock, Shares Issued, Total (in shares)											0	0
Preferred Stock, Shares Outstanding, Ending Balance (in shares)											0	0
Share-based Payment Arrangement, Expense, Tax Benefit \| $											$ 6,200	$ 5,500	$ 5,500
Share-based Payment Arrangement, Accelerated Cost \| $											27,300
Share-based Payment Arrangement, Expense \| $											$ 67,579	$ 40,035	$ 34,892
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) \| $ / shares											$ 41.23	$ 35.49	$ 34.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)	[1]										725,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value \| $											$ 42,500	$ 77,500	$ 52,100
Stock Repurchased and Retired During Period, Shares (in shares)											1,100,000	1,300,000	1,000,000
Stock Repurchased and Retired During Period, Value \| $											$ 130,000	$ 126,700	$ 86,400
Stock Repurchase Program, Remaining Authorized Repurchase Amount \| $											271,800
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $											$ 16,700
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)											2 years 9 months 18 days
Share-based Payment Arrangement, Option [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						3 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)						224,000	124,000
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number (in shares)					348,000
Share-based Payment Arrangement, Expense \| $											$ 13,300	200	300
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)											348
Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $											$ 77,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)											2 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)	[2]										530,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	[3]										583,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value \| $											$ 59,500	46,500	37,900
Restricted Stock Units (RSUs) [Member] \| Time based Shared Based Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)						69,000	49,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)								56,000
Share based Compensation Arrangement by Share based Payment Award, Vesting Period, Number Of Quarterly Periods						16	16	16
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number (in shares)					127,000
Restricted Stock Units (RSUs) [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)								3 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)								33						33,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)									22,000	15,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage								33.33%
Share-Based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Target Number Of Shares (in shares)								11,000
Share-based Compensation Termination Period Trigger (Month)						12 months
Share-Based Compensation, Percentage Of Shares That Will Vest Upon Trigger						100.00%
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period As A Percentage Of Target									200.00%	135.00%
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number (in shares)					44,000
Share-based Payment Arrangement, Expense \| $											5,300	$ 2,800	$ 900
ESPP Shares [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $											$ 200
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)											1 month 6 days
Performance-based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)											11,000
Performance-based Restricted Stock Units [Member] \| President and Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)				3 years
Share-based Compensation Termination Period Trigger (Month)				12 months
Share-Based Compensation, Percentage Of Shares That Will Vest Upon Trigger				100.00%	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)				10,000
Performance-based Restricted Stock Units [Member] \| Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		73,000									34,000
Maximum [Member] \| Share-based Payment Arrangement, Option [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage						200.00%	200.00%
Maximum [Member] \| Restricted Stock Units (RSUs) [Member] \| President and Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage								200.00%
Maximum [Member] \| Restricted Stock Units (RSUs) [Member] \| Performance Shares, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage								200.00%
Maximum [Member] \| Performance-based Restricted Stock Units [Member] \| President and Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage				200.00%
Maximum [Member] \| Performance-based Restricted Stock Units [Member] \| Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage		200.00%
Minimum [Member] \| Share-based Payment Arrangement, Option [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage						0.00%	0.00%
Minimum [Member] \| Restricted Stock Units (RSUs) [Member] \| President and Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage								0.00%
Minimum [Member] \| Restricted Stock Units (RSUs) [Member] \| Performance Shares, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage								0.00%
Minimum [Member] \| Performance-based Restricted Stock Units [Member] \| President and Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage				0.00%
Minimum [Member] \| Performance-based Restricted Stock Units [Member] \| Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage		0.00%
The 2000 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Strike Price as a Percentage of Market Value											85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)											0
The 2000 Equity Incentive Plan [Member] \| Maximum [Member] \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)											4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)											10 years
The 2012 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)											4 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)											8,091
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Annual Increase, Shares (in shares)												3,050
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Annual Increase, Percent of Shares Outstanding											5.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares)											1,963
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)											17,662
The 2021 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)			600,000
Share-based Compensation Arrangement by Share-based Payment Award, Offering Period (Month)			6 months
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent			85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) \| $ / shares											$ 26.88
The 2021 Employee Stock Purchase Plan [Member] \| Maximum [Member]
Employee Stock Purchase Plan, Percentage of Eligible Compensation Contributable			15.00%
The 2021 Employee Stock Purchase Plan [Member] \| Minimum [Member]
Employee Stock Purchase Plan, Percentage of Eligible Compensation Contributable			1.00%

[1]	Included 348 thousand shares of PSOs.
[2]	Included 11 thousand additional shares of PSUs vested as a result of the Company achieving the corresponding level of performance goals for 2020.
[3]	Included 34 thousand shares of PSUs granted to certain executive officers in 2021 and 11 thousand additional shares of PSUs vested as a result of the Company achieving the corresponding level of performance goals for 2020.

Note 10 - Stockholders' Equit_4

Note 10 - Stockholders' Equity and Stock-based Compensation - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock-based compensation	$ 67,579	$ 40,035	$ 34,892
Cost of Sales [Member]
Stock-based compensation	3,782	2,767	2,262
Research and Development Expense [Member]
Stock-based compensation	10,750	13,502	11,151
Selling and Marketing Expense [Member]
Stock-based compensation	6,323	5,785	4,984
General and Administrative Expense [Member]
Stock-based compensation	$ 46,724	$ 17,981	$ 16,495

Note 10 - Stockholders' Equit_5

Note 10 - Stockholders' Equity and Stock-based Compensation - Fair Value Assumptions, Stock Options (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Dividend yield	0.00%	0.00%	0.00%
Minimum [Member]
Expected term (in years) (Year)	5 years 2 months 12 days	4 years 6 months	4 years 4 months 24 days
Volatility	38.00%	38.00%	40.00%
Risk-free interest rate	0.50%	0.30%	1.50%
Maximum [Member]
Expected term (in years) (Year)	5 years 6 months	5 years 6 months	6 years 7 months 6 days
Volatility	41.00%	43.00%	46.00%
Risk-free interest rate	1.20%	1.40%	2.40%

Note 10 - Stockholders' Equit_6

Note 10 - Stockholders' Equity and Stock-based Compensation - Share-based Compensation and Stock Options Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Balance (in shares)		2,215
Weighted average exercise price, balance (in dollars per share)		$ 59.07
Weighted Average Remaining Contractual Life Balance (Year)		6 years	6 years 6 months
Aggregate intrinsic value		$ 130,791	$ 139,121
Granted (in shares)		495
Weighted average exercise price, granted (in dollars per share)		$ 112.43
Exercised (in shares)	[1]	(725)
Weighted average exercise price, exercised (in dollars per share)		$ 68.91
Canceled (in shares)		(147)
Weighted average exercise price, canceled (in dollars per share)		$ 102.92
Balance (in shares)		1,838	2,215
Weighted average exercise price, balance (in dollars per share)		$ 66.05	$ 59.07
Vested and expected to vest (in shares)		1,659
Vested and Expected to vest, weighted average exercise price (in dollars per share)		$ 61.43
Vested and Expected to vest, weighted average remaining contractual life (Year)		5 years 8 months 12 days
Vested and Expected to vest, aggregate intrinsic value		$ 125,769
Exercisable (in shares)		1,168
Exercisable, Weighted average exercise price (in dollars per share)		$ 42.60
Exercisable, weighted average remaining contractual life (Year)		4 years 3 months 18 days
Exercisable, aggregate intrinsic value		$ 110,495

[1]	Included 348 thousand shares of PSOs.

Note 10 - Stockholders' Equit_7

Note 10 - Stockholders' Equity and Stock-based Compensation - Share-based Compensation, Restricted Stock and Restricted Stock Units (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2021$ / sharesshares
Cancelled, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 90.42
Expected to vest, number of shares (in shares) \| shares	815
Expected to vest, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 104.22
Restricted Stock Units (RSUs) [Member]
Balance, number of shares (in shares) \| shares	1,047
Balance, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 86.78
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) \| shares	583	[1]
Granted, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 114.59
Vested, number of shares (in shares) \| shares	(530)	[2]
Vested, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 84.97
Cancelled, number of shares (in shares) \| shares	(183)
Balance, number of shares (in shares) \| shares	917	[3]
Balance, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 104.78

[1]	Included 34 thousand shares of PSUs granted to certain executive officers in 2021 and 11 thousand additional shares of PSUs vested as a result of the Company achieving the corresponding level of performance goals for 2020.
[2]	Included 11 thousand additional shares of PSUs vested as a result of the Company achieving the corresponding level of performance goals for 2020.
[3]	Included 34 thousand shares of PSUs granted to certain executive officers in 2021.

Note 10 - Stockholders' Equit_8

Note 10 - Stockholders' Equity and Stock-based Compensation - Employee Stock Purchase Plan, Valuation Assumptions (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Dividend yield	0.00%	0.00%	0.00%
The 2021 Employee Stock Purchase Plan [Member]
Expected term (in years) (Year)	6 months
Volatility	34.00%
Risk-free interest rate	0.10%
Dividend yield	0.00%

Note 10 - Stockholders' Equit_9

Note 10 - Stockholders' Equity and Stock-based Compensation - Schedule of Repurchase Agreements (Details) - USD ($) $ in Billions	Dec. 31, 2021	Nov. 03, 2021	Feb. 10, 2021	May 07, 2020	Oct. 30, 2019	Oct. 30, 2018	Feb. 12, 2018
Authorized Dollar Value	$ 0.7						$ 0.1
October 30, 2018		$ 0.2	$ 0.1	$ 0.1	$ 0.1	$ 0.1

Note 11 - Employee Benefits P_2

Note 11 - Employee Benefits Plan (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
401(k) Plan [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 2.4	$ 1.3	$ 1.3
Provident Fund Plan and Gratuity Plan [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1.7	$ 1.4	$ 1.1

Note 12 - Income Taxes (Details

Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets, Valuation Allowance, Total	$ 11,364	$ 11,188
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	200
Operating Loss Carryforwards, Total	700
Tax Credit Carryforward, Amount	15,500
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 4,900	$ 4,600	$ 4,200
Open Tax Year	2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Foreign Tax Authority [Member]
Tax Credit Carryforward, Amount	$ 900

Note 12 - Income Taxes - Schedu

Note 12 - Income Taxes - Schedule of Income before Income Tax, Domestic and Foreign (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Domestic	$ 80,472	$ 94,099	$ 72,124
Foreign	8,925	7,938	7,859
Income before income taxes	$ 89,397	$ 102,037	$ 79,983

Note 12 - Income Taxes - Sche_2

Note 12 - Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal	$ 20,135	$ 1,944	$ (90)
State	4,324	1,438	646
Foreign	3,701	3,571	3,000
Current income tax provision	28,160	6,953	3,556
Federal	(7,342)	4,239	7,085
State	(1,722)	26	447
Foreign	(659)	(753)	(441)
Deferred income tax provision (benefit)	(9,723)	3,512	7,091
Income tax provision	$ 18,437	$ 10,465	$ 10,647

Note 12 - Income Taxes - Sche_3

Note 12 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal statutory rate	21.00%	21.00%	21.00%
State taxes	3.10%	1.60%	1.50%
Stock-based compensation	10.30%	4.80%	4.00%
Excess tax benefits related to stock-based compensation	(5.40%)	(13.80%)	(11.20%)
Foreign source income	0.40%	0.20%	0.10%
Change in valuation allowance	0.20%	0.80%	1.10%
Foreign-derived intangible income deduction	(7.00%)	(1.70%)	0.00%
Federal and state research and development credit	(1.90%)	(2.60%)	(3.70%)
Other	(0.10%)	0.00%	0.40%
Income tax provision	20.60%	10.30%	13.20%

Note 12 - Income Taxes - Sche_4

Note 12 - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Research and development credit carryforwards	$ 10,743	$ 16,965
Foreign tax credit carryforwards	933	3,497
Accrued liabilities	1,655	2,019
Deferred revenues	7,250	5,123
Operating lease liabilities	11,777	15,924
Intangible assets	12,377	1,397
Stock-based compensation	4,085	3,907
Other	2,987	720
Gross deferred tax assets	51,807	49,552
Valuation allowance	(11,364)	(11,188)
Net deferred tax assets	40,443	38,364
Fixed assets	(3,320)	(7,017)
Operating leases - right of use asset	(9,010)	(13,054)
Deferred commissions	(3,026)	(2,482)
Total deferred tax liabilities	(15,356)	(22,553)
Net deferred tax assets	$ 25,087	$ 15,811

Note 12 - Income Taxes - Sche_5

Note 12 - Income Taxes - Schedule of Unrecognized Tax Benefits Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unrecognized tax benefits beginning balance	$ 8,855	$ 7,778	$ 6,406
Gross increase for tax positions of prior years	0	4	0
Gross decrease for tax positions of prior years	(25)	0	(12)
Gross increase for tax positions of current year	846	1,258	1,384
Lapse of statute of limitations	0	(185)	0
Total unrecognized tax benefits	$ 9,676	$ 8,855	$ 7,778

Note 13 - Segment and Geograp_3

Note 13 - Segment and Geographic Area Information (Details Textual)	12 Months Ended
	Dec. 31, 2021
Number of Operating Segments	1
Number of Reportable Segments	1

Note 13 - Segment and Geograp_4

Note 13 - Segment and Geographic Area Information - Revenue and Property and Equipment, Net by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 411,172	$ 362,963	$ 321,607
Property and equipment, net and Operating leases - right of use asset	98,870	109,688
UNITED STATES
Revenues	250,761	230,444	206,555
Property and equipment, net and Operating leases - right of use asset	66,440	69,256
Non-US [Member]
Revenues	160,411	132,519	$ 115,052
INDIA
Property and equipment, net and Operating leases - right of use asset	20,401	24,774
Other Geographic Areas [Member]
Property and equipment, net and Operating leases - right of use asset	$ 12,029	$ 15,658

Note 14 - Net Income Per Shar_2

Note 14 - Net Income Per Share - Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 70,960	$ 91,572	$ 69,336
Basic weighted average shares (in shares)	39,030	39,167	39,075
Stock options (in shares)	863	1,262	1,806
Restricted stock units (in shares)	224	311	403
Employee stock purchase plan (in shares)	1	0	0
Diluted weighted average shares (in shares)	40,118	40,740	41,284
Basic (in dollars per share)	$ 1.82	$ 2.34	$ 1.77
Diluted (in dollars per share)	$ 1.77	$ 2.25	$ 1.68

Note 14 - Net Income Per Shar_3

Note 14 - Net Income Per Share - Anti-dilutive Net Income Per Share (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive securities (in shares)	595	584	512
Share-based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)	534	532	460
Restricted Stock Units (RSUs) [Member]
Antidilutive securities (in shares)	61	52	52