Stockholders’ Equity and Stock-Based Compensation - Option Activities (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Number of Shares Underlying Outstanding Options
Outstanding, beginning balance (in shares)	8,685
Options granted (in shares)	0
Options exercised (in shares)	(737)
Options canceled (in shares)	(121)
Outstanding, ending balance (in shares)	7,827	8,685
Vested and exercisable (in shares)	6,304
Weighted- Average Exercise Price per Share
Outstanding, beginning balance (in dollars per share)	$ 12.45
Options granted (in dollars per share)	0
Options exercised (in dollars per share)	10.09
Options canceled (in dollars per share)	18.11
Outstanding, ending balance (in dollars per share)	12.58	$ 12.45
Vested and exercisable (in dollars per share)	$ 10.07
Weighted- Average Remaining Contractual Term (Years) and Aggregate Intrinsic Value of Stock Options
Weighted-average remaining contractual term of stock options outstanding	2 years 7 months 6 days	2 years 9 months 18 days
Weighted-average remaining contractual term of stock options vested and exercisable	2 years 2 months 12 days
Aggregate intrinsic value of stock options outstanding	$ 989,294	$ 1,140,369
Aggregate intrinsic value of stock options outstanding, vested and exercisable	$ 812,692