Stockholders' Equity - Summary of Unvested Restricted Stock Unit Activity (Detail) - Restricted Stock Units [Member]	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Class of Stock [Line Items]
Shares, Unvested as of January 1, 2022 | shares	11,718,813
Shares, Granted | shares	10,622,982
Shares, Vested | shares	(3,005,281)
Shares, Cancelled/Forfeited | shares	(1,787,601)
Shares, Unvested as of June 30, 2022 | shares	17,548,913
Weighted Average Grant Date Fair Value, Unvested as of January 1, 2022 | $ / shares	$ 19.63
Weighted Average Grant Date Fair Value, Granted | $ / shares	4.09
Weighted Average Grant Date Fair Value, Vested | $ / shares	12.55
Weighted Average Grant Date Fair Value, Cancelled/Forfeited | $ / shares	9.04
Weighted Average Grant Date Fair Value, Unvested as of June 30, 2022 | $ / shares	$ 7.75