LEASES - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Finance lease amortization expense	$ 300	$ 44
Finance lease, interest expense	10	3
Operating lease, expense	$ 2,800	$ 2,400	$ 1,900