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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% |  |  |

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