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Stockholders' Equity - Nonqualified Cash Plan and Equity Incentive Plans (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Stockholders' Equity |  |
Deferred compensation investment | $ 4.8 | $ 4.1
Expiration period | 10 years |
Vesting percentage | 100.00% |
Maximum | Options to purchase common stock |  |
Stockholders' Equity |  |
Number of shares reserved for issuance (in shares) | 18,322,154 |
First Anniversary |  |
Stockholders' Equity |  |
Monthly vesting percentage | 2.08% |
Vesting percentage | 25.00% |

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