STOCKHOLDERS' EQUITY - Summary of Stock Option Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Number of Shares
Options outstanding at beginning of period (in shares) | shares	11,478,698
Options granted (in shares) | shares	3,619,775
Options exercised (in shares) | shares	(725,058)
Options canceled (in shares) | shares	(2,410,138)
Options outstanding at end of period (in shares) | shares	11,963,277
Options exercisable at end of period (in shares) | shares	6,541,228
Weighted- Average Exercise per Share Price
Options outstanding at beginning of period (in dollars per share) | $ / shares	$ 10.02
Options granted (in dollars per share) | $ / shares	11.13
Options exercised (in dollars per share) | $ / shares	7.79
Options canceled (in dollars per share) | $ / shares	10.67
Options outstanding at end of period (in dollars per share) | $ / shares	10.36
Options exercisable at end of period (in dollars per share) | $ / shares	$ 10.51
Weighted-Average Remaining Contractual Term
Options outstanding at end of period (in years)	7 years 3 months 18 days
Options exercisable at end of period (in years)	6 years 1 month 20 days
Aggregate Intrinsic Value
Options outstanding at end of period | $	$ 4,603
Options exercisable at end of period | $	$ 3,968