STOCK-BASED COMPENSATION - Summary of Company's Stock Option Activity and Related Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Number of Stock Options Outstanding
Number of Stock Options Outstanding, Beginning balance	8,142,348
Number of Stock Options Outstanding, Options granted	0
Number of Stock Options Outstanding, Options exercised	(6,021)
Number of Stock Options Outstanding, Options cancelled or forfeited	(39,422)
Number of Stock Options Outstanding, Ending balance	8,096,905	8,142,348
Number of Stock Options Outstanding, Options exercisable	5,676,389
Number of Stock Options Outstanding, Options vested and expected to vest	7,889,379
Weighted- Average Exercise Price
Weighted- Average Exercise Price, Beginning balance	$ 7.14
Weighted- Average Exercise Price, Options granted	0
Weighted- Average Exercise Price, Options exercised	3.10
Weighted- Average Exercise Price, Options cancelled or forfeited	6.58
Weighted- Average Exercise Price, Ending balance	7.15	$ 7.14
Weighted- Average Exercise Price, Options exercisable	7.24
Weighted- Average Exercise Price,Options vested and expected to vest	$ 7.18
Weighted- Average Remaining Contractual Life (Years)
Options Outstanding, Weighted- Average Remaining Contractual Life (Years)	6 years 10 months 24 days	7 years 3 months 18 days
Weighted- Average Remaining Contractual Life (Years), Options exercisable	6 years 4 months 24 days
Weighted- Average Remaining Contractual Life (Years), Options vested and expected to vest	6 years 10 months 24 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value	$ 3,309	$ 2,638
Aggregate Intrinsic Value, Options exercisable	1,755
Aggregate Intrinsic Value, Options vested and expected to vest	$ 3,101