Issuance of Unvested Restricted Stock In Connection With Acquisition, Shares

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Restricted Stock Issued In Connection With Acquisition, Aggregate Grant Date Fair Value

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Share-Based Compensation Arrangement By Share-Based Payment Award, Exercise Price To Fair Market Value, Percent

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Share-Based Compensation Arrangement By Share-Based Payment Award, Maximum Contribution Per Employee, Percent

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Share-Based Compensation Arrangement By Share-Based Payment Award, Maximum Employee Subscription Amount

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Share-Based Compensation Arrangement By Share-based Payment Award, Maximum Ownership Percentage Threshold For Participation

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Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Additional Shares Allowable Under The Plan

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Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of New Shares Authorized

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- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Offering Period

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Nonvested, Exercisable, Number

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Share-based Compensation Arrangement By Share-based Payment Award, Purchase Period

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Share-Based Compensation Arrangement By Share-Based Payment Award, Remaining Number Of Shares Authorized

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- Definition

Share-based Payment Arrangement, Option, Number Of Shares Receivable Upon Exercise Of Stock Option

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Share-Based Payment Award, Annual Percentage Of Shares Authorized

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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Number of shares to be repurchased in accordance with a policy to use treasury stock to satisfy share-award conversions.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The highest quantity of shares an employee can purchase under the plan per period.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Purchase price of common stock expressed as a percentage of its fair value.

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Number of shares of stock issued during the period pursuant to acquisitions.

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Stock-based Compensation - Narrative (Details) - USD ($)				1 Months Ended			3 Months Ended		12 Months Ended
	Feb. 14, 2022	Jan. 14, 2022	Oct. 15, 2021	Dec. 31, 2021	Jan. 31, 2020	Sep. 30, 2019	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)							0	0
Total grant date fair value for vested options							$ 2,500,000	$ 5,800,000
Stock options exercisable, weighted-average exercise price (in dollars per share)							$ 2.62
Stock-based compensation expense							$ 33,965,000	18,038,000
S2 Systems Corporation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock in connection with acquisition (in shares)					948,000
2019 Equity Incentive Plan \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period of awards				10 years
2019 Equity Incentive Plan \| Chief Operating Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period of awards				10 years
2019 Equity Incentive Plan \| President
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period of awards				10 years
2019 Equity Incentive Plan \| Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)							66,661,953
Number of new shares authorized for issuance (in shares)							29,335,000
Number of additional shares authorized for issuance (in shares)							37,326,953
Stock options granted (in shares)	4,915,000
Number of shares available for issuance (in shares)				3,960,000					3,960,000
Stock options exercisable, weighted-average exercise price (in dollars per share)				$ 136.81					$ 136.81
2019 Equity Incentive Plan \| Class A and Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential increase in number of shares authorized, as a percentage of total common stock outstanding							5.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	10 years						4 years
Expiration period							10 years
Unvested options exercisable (in shares)				6,229,524			5,303,657		6,229,524
Options unrecognized stock-based compensation expense				$ 20,100,000			$ 17,500,000		$ 20,100,000
Weighted-average remaining vesting period							2 years 1 month 6 days		2 years 3 months 18 days
Liability for early exercise of stock options				$ 4,700,000			$ 3,900,000		$ 4,700,000
Number of unvested shares expected to be repurchased (in shares)							1,783,279		2,128,660
Stock Options \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period of awards				10 years
Stock Options \| Chief Operating Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period of awards				10 years
Stock Options \| President
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period of awards				10 years
Stock Options \| 2010 Equity Incentive Plan \| Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of common stock, percentage of fair market value							100.00%
Stock Options \| 2010 Equity Incentive Plan \| Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise stock option awards (in shares)							1
Stock Options \| 2010 Equity Incentive Plan \| Class B common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise stock option awards (in shares)							1
Stock Options \| 2019 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	10 years
Stock Options \| 2019 Equity Incentive Plan \| Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise stock option awards (in shares)							1
Restricted Stock \| Vectrix, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
Issuance of common stock in connection with acquisition (in shares)		71,000
Stock-based compensation expense							$ 0
Unrecognized stock-based compensation expense							4,900,000
Restricted Stock \| Vectrix, Inc. \| Subject to vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock in connection with acquisition (in shares)		52,000
Restricted Stock \| Vectrix, Inc. \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Restricted Stock \| Vectrix, Inc. \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Restricted Stock \| Vectrix, Inc. \| Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Restricted Stock \| Vectrix, Inc. \| Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Restricted Stock \| Zaraz
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Issuance of common stock in connection with acquisition (in shares)			48,000
Unrecognized stock-based compensation expense							5,500,000
Restricted Stock \| Zaraz \| Subject to vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock in connection with acquisition (in shares)			39,000
Restricted Stock \| Zaraz \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			33.33%
Restricted Stock \| Zaraz \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			33.33%
Restricted Stock \| Zaraz \| Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			33.33%
Restricted Stock \| S2 Systems Corporation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense							800,000	1,400,000
Unrecognized stock-based compensation expense							2,400,000	7,400,000
Restricted stock issued in connection with acquisition, aggregate grant date fair value							$ 11,200,000	0
Restricted Stock \| S2 Systems Corporation \| Subject to vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of restricted stock in connection with acquisition (in shares)					841,000
Restricted Stock \| S2 Systems Corporation \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					2 years
Vesting percentage					38.90%
Restricted Stock \| S2 Systems Corporation \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					3 years
Vesting percentage					38.90%
Restricted Stock \| S2 Systems Corporation \| Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage					7.40%
Restricted Stock \| S2 Systems Corporation \| Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage					7.40%
Restricted Stock \| S2 Systems Corporation \| Tranche Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage					7.40%
Restricted Stock \| S2 Systems Corporation \| Over 2 years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage					77.80%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							4 years
Weighted-average remaining vesting period							3 years 3 months 18 days		3 years 6 months
Stock-based compensation expense							$ 35,200,000	13,600,000
Unrecognized stock-based compensation expense				$ 176,200,000			342,300,000		$ 176,200,000
Total grant date fair value for vested shares							$ 22,400,000	$ 9,900,000
Shares issuable pursuant to the ESPP \| 2019 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining vesting period							1 month 6 days	4 months 24 days
Unrecognized stock-based compensation expense				$ 2,600,000			$ 800,000		$ 2,600,000
Maximum ownership percentage threshold for participation						5.00%
Maximum contribution percentage per employee						10.00%
Shares issuable pursuant to the ESPP \| 2019 Employee Stock Purchase Plan \| Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares allowable under the plan (in shares)						5,870,000
Purchase price of common stock, percentage of fair value						85.00%
Offering period						6 months
Purchase period						6 months
Maximum number of shares available for repurchase for each employee (more than, in shares)						1,500
Maximum value of shares available for repurchase for each employee						$ 25,000
Shares issuable pursuant to the ESPP \| 2019 Employee Stock Purchase Plan \| Class A and Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential increase in number of share authorized, as a percentage of total common stock outstanding						1.00%