Stock-Based Compensation - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Options to purchase common stock
Stock Based Compensation
Shares available for grant, beginning balance	4,319,000
Additional shares authorized	3,500,000
Options granted (in shares)	(264,000)
Options forfeited (in shares)	28,000
RSUs granted (in shares)	(4,698,000)
RSUs forfeited/cancelled (in shares)	308,000
Shares available for grant, end balance	3,193,000	4,319,000
Number of shares
Outstanding, beginning balance (in shares)	5,900,000
Options granted (in shares)	264,000
Options exercised (in shares)	(701,000)
Options forfeited (in shares)	(28,000)
Outstanding, end balance (in shares)	5,435,000	5,900,000
Exercisable (in shares)	4,550,000
Vested and expected to vest (in shares)	5,380,000
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 17.54
Granted (in dollars per share)	61.49
Exercised (in dollars per share)	6.53
Forfeited (in dollars per share)	36.77
Outstanding, end balance (in dollars per share)	21.00	$ 17.54
Exercisable (in dollars per share)	12.00
Vested and expected to vest (in dollars per share)	$ 20.55
Additional disclosures
Weighted average contractual term, options outstanding	5 years 4 months 20 days	5 years 4 months 24 days
Exercisable (in years)	4 years 9 months 14 days
Vested and expected to vest (in years)	5 years 4 months 9 days
Aggregate intrinsic value, options outstanding	$ 112,272	$ 451,505
Aggregate intrinsic value, options exercisable	108,487
Aggregate intrinsic value, vested and expected to vest	$ 112,049
Non-employee stock options
Stock Based Compensation
Options granted (in shares)	(28,053)
Number of shares
Options granted (in shares)	28,053
Restricted stock units
Stock Based Compensation
RSUs granted (in shares)	(4,698,000)
RSUs forfeited/cancelled (in shares)	308,000