Stock-Based Compensation Expense - Summary of Share-Based Payment Arrangement, Restricted Stock And Restricted Stock Unit, Activity (Detail) - Restricted Stock Units (RSUs) [Member]	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Schedule Of Share Based Compensation Restricted Stock And Restricted Stock Units Activity [Line Items]
Number of shares, Outstanding as of December 31, 2021 | shares	11,302,697
Number of shares, Granted | shares	5,577,949
Number of shares, Vested | shares	(7,876,591)
Number of shares, Forfeited or cancelled | shares	(270,654)
Number of shares, Outstanding as of June 30, 2022 | shares	8,733,401
Weighted average grant date fair value, Outstanding as of December 31, 2021 | $ / shares	$ 6.88
Weighted average grant date fair value, Granted | $ / shares	1.50
Weighted average grant date fair value, Vested | $ / shares	6.47
Weighted average grant date fair value, Forfeited or cancelled | $ / shares	6.81
Weighted average grant date fair value, Outstanding as of June 30, 2022 | $ / shares	$ 3.81