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Stockholders' Equity - Incentive Plan and Stock Purchase Plan (Details) shares in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) shares
Class of Stock [Line Items] |
Number of shares authorized (in shares) | 9.0
Available future grants and awards (in shares) | 3.9
Award vesting period | 4 years
Expiration period | 8 years
Anniversary period | 18 months
Restricted Stock Awards |
Class of Stock [Line Items] |
Award vesting period | 4 years
Restricted Stock Units |
Class of Stock [Line Items] |
Award vesting period | 3 years
Cliff period | 1 year
Employee Stock | Stock Purchase Plan |
Class of Stock [Line Items] |
Maximum stock purchase per employee | $ | $ 1,000,000
Stock purchase plan restricted sale of stock period | 2 years
Percent of common stock granted in proportion to common stock purchased | 20.00%
Vesting percentage of restricted stock granted in relation to shares purchased under the stock purchase plan | 50.00%
Vesting period of restricted stock granted in relation to shares purchased under the stock purchase plan | 2 years
Term for stock option purchase in relation to stock purchase plan | 5 years
Vesting period of stock options purchased in relation to shares purchased under the stock purchase plan | 2 years
Vesting percentage of purchase of stock options in relation to shares purchased under the stock purchase plan | 50.00%
Employee Stock | Stock Purchase Plan | Non-Employee Chairman |
Class of Stock [Line Items] |
Vesting percentage of purchase of stock options in relation to shares purchased under the stock purchase plan | 50.00%
Employee Stock | Stock Purchase Plan | Non-Employee Board Member |
Class of Stock [Line Items] |
Vesting percentage of purchase of stock options in relation to shares purchased under the stock purchase plan | 35.00%
Employee Stock | Stock Purchase Plan | Executive Officer | Minimum |
Class of Stock [Line Items] |
Vesting percentage of purchase of stock options in relation to shares purchased under the stock purchase plan | 50.00%
Employee Stock | Stock Purchase Plan | Executive Officer | Maximum |
Class of Stock [Line Items] |
Vesting percentage of purchase of stock options in relation to shares purchased under the stock purchase plan | 70.00%

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