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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 20, 2022 | Apr. 01, 2022 | Feb. 14, 2022 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Subsequent Event [Line Items] |  |  |  |  |  |
Stock options granted (in shares) |  |  |  | 0 | 0 |
Stock options granted, weighted-average exercise price (in dollars per share) |  |  |  | $ 0 |  |
Stock Options |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Vesting period |  |  | 10 years | 4 years |  |
Weighted-average remaining vesting period |  |  |  | 2 years 1 month 6 days |  | 2 years 3 months 18 days
Options unrecognized stock-based compensation expense |  |  |  | $ 17.5 |  | $ 20.1
Stock Options | 2019 Equity Incentive Plan |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Vesting period |  |  | 10 years |  |  |
Class A common stock | 2019 Equity Incentive Plan |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Stock options granted (in shares) |  |  | 4,915,000 |  |  |
Stock options granted, weighted-average exercise price (in dollars per share) |  |  | $ 105.56 |  |  |
Subsequent Event |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Options unrecognized stock-based compensation expense | $ 300.0 |  |  |  |  |
Subsequent Event | Stock Options |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Weighted-average remaining vesting period | 5 years |  |  |  |  |
Area 1 Security, Inc | Subsequent Event |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Consideration transferred or transferrable |  | $ 162.0 |  |  |  |
Area 1 Security, Inc | Subsequent Event | Class A common stock |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Consideration payable in common stock, percentage |  | 40.00% |  |  |  |

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