LEASES - Other Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,355		$ 1,400
Operating cash flows from finance leases	616	$ 615	615
Financing cash flows from finance leases	203		(586)
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	491		2,629
Finance leases	$ 3,702		$ 146
Weighted-average remaining lease term:
Operating leases (in years)	3 years		3 years 1 month 6 days
Finance leases (in years)	13 years 6 months		13 years 10 months 24 days
Weighted-average discount rate:
Operating leases	9.28%		9.26%
Finance leases	7.92%		8.00%