Stockholders' Equity - Narrative (Details)		1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 01, 2022 shares	Jun. 30, 2020 USD ($)	Mar. 31, 2022 USD ($) period $ / shares shares	Mar. 31, 2021 USD ($) $ / shares	Dec. 31, 2018	Dec. 31, 2021 shares
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)			10,000,000			10,000,000
Common stock, shares outstanding (in shares)			78,087,000			77,962
Shares reserved for 401(k) (in shares)			35,067,000			31,891,000
Aggregate offering price | $		$ 150,000,000
Common stock remaining to be sold under open market sales agreement | $			$ 127,200,000
Stock options, early exercise, repurchase period					4 years
Weighted-average grant date fair value of stock options, granted (in dollars per share) | $ / shares			$ 10.19	$ 19.83
Intrinsic value of stock options exercised | $			$ 1,300,000	$ 22,300,000
Tax benefits realized | $			$ 0	$ 0
Common stock, shares issued (in shares)			78,087,000			77,962
401(k) Matching Plan
Class of Stock [Line Items]
Shares reserved for 401(k) (in shares)	200,000		200,000			17,813
Pension Plan
Class of Stock [Line Items]
Maximum annual contributions of common stock per employee per year | $			$ 750
Common stock reserved for future issuance (in shares)	3,500
Percentage of contribution matched by employer in common stock	50.00%
401(k) Matching Plan
Class of Stock [Line Items]
Maximum percentage of payroll deductions of employee's compensation			15.00%
Maximum duration for purchase under employee stock purchase plan			24 months
Number of purchase periods | period			4
Duration of each purchase period			6 months
Percentage of purchase of common stock fair market value			85.00%
Common stock, shares issued (in shares)			493,022
Minimum
Class of Stock [Line Items]
Stock options, vesting period					4 years
Maximum
Class of Stock [Line Items]
Stock options, vesting period					10 years