LEASES - Summary of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finance lease cost:
Amortization of ROU assets	$ 790	$ 827	$ 820
Interest on lease liabilities	42	39	44
Total finance lease cost	832	866	864
Operating lease cost	821	898	1,462
Short-term lease cost	128	549	358
Total lease cost	$ 1,781	$ 2,313	$ 2,684