LEASES - Maturities of Operating and Financing Lease Liabilities (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Operating Leases
April 1, 2021 - December 31, 2021	$ 584
2022	586
2023	584
2024	544
2025	0
Total minimum lease payments	2,298
Less: imputed interest	(175)
Total operating lease liabilities	2,123
Finance Lease
April 1, 2021 - December 31, 2021	38
2022	50
2023	50
2024	50
2025	46
Total minimum lease payments	234
Less: imputed interest	(30)
Total operating lease liabilities	$ 204