Stockholders' Equity - Summary of Non-Vested Stock Options (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at beginning of period (in shares)	4,045,200
Nonvested, granted (in shares)	3,823,919
Nonvested, vested (in shares)	(1,811,558)
Nonvested, forfeited (in shares)	(950,277)
Nonvested at end of period (in shares)	5,107,284
Weighted average grant date fair value, nonvested at end of period (in dollars per share) | $ / shares	$ 4.32
Nonvested intrinsic value | $	$ 41