INCOME TAX - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense	$ 0	$ 0
Unrecognized tax benefits	2,800,000		$ 2,700,000
Accrued interest and penalties related to uncertain tax positions	$ 0		$ 0