Stockholders' Equity - Incentive Plan and Stock Purchase Plan (Details) shares in Millions	12 Months Ended
	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%