Stock Based Compensation - Stock Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares
Number of Shares Available for Issuance Under the Plan
Beginning balance (in shares)	51,437,898
Additional shares authorized (in shares)	20,437,691
Options and restricted stock units granted (in shares)	(9,590,240)
Options canceled (in shares)	3,835,184
Ending balance (in shares)	66,120,533	51,437,898
Number of Shares Outstanding Under the Plan
Beginning balance (in shares)	27,727,088
Options granted (in shares)	0
Options exercised (in shares)	(9,450,757)
Options canceled (in shares)	(559,821)
Ending balance (in shares)	17,716,510	27,727,088
Exercisable (in shares)	4,541,859	13,157,036
Unvested (in shares)	13,174,651	14,570,052
Weighted- Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 7.79
Options granted (in dollars per share) | $ / shares	0
Options exercised (in dollars per share) | $ / shares	0.10
Options canceled (in dollars per share) | $ / shares	1.10
Ending balance (in dollars per share) | $ / shares	12.11	$ 7.79
Exercisable, weighted-average exercise price (in dollars per share) | $ / shares	0.33	0.15
Unvested, weighted-average exercise price (in dollars per share) | $ / shares	$ 16.18	$ 14.69
Weighted-Average Remaining Contractual Term and Aggregate Intrinsic Value
Options outstanding, weighted-average remaining contractual term	7 years 7 months 24 days	7 years 14 days
Exercisable, weighted-average remaining contractual term	5 years 7 months 13 days	5 years 2 months 1 day
Unvested, weighted-average remaining contractual term	8 years 4 months 6 days	8 years 8 months 19 days
Options outstanding, aggregate intrinsic value | $	$ 4,993	$ 113,110
Exercisable, aggregate intrinsic value | $	4,337	95,946
Unvested, aggregate intrinsic value | $	$ 656	$ 17,164
Restricted stock units
Number of Plan shares outstanding
Beginning balance (in shares)	7,600,097
Restricted stock units granted (in shares)	9,590,240
Restricted stock units released (in shares)	(701,280)
Restricted stock units canceled (in shares)	(3,275,363)
Ending balance (in shares)	13,213,694	7,600,097
Weighted-Average Grant Date Fair Value per share
Beginning balance (in dollars per share) | $ / shares	$ 13.17
Granted (in dollars per share) | $ / shares	2.59
Vested (in dollars per share) | $ / shares	18.14
Forfeited (in dollars per share) | $ / shares	11.72
Ending balance (in dollars per share) | $ / shares	$ 5.59	$ 13.17