LEASES - Components of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Finance lease cost:
Amortization of leased assets	$ 16	$ 74
Interest on lease liabilities	5	21
Operating lease cost	56	814
Short-term lease cost	53	582
Total lease cost	$ 130	$ 1,491
Weighted-average remaining lease term, operating leases	0 years	1 year 8 months 12 days
Weighted-average remaining lease term, finance leases	0 years	1 year 4 months 24 days
Weighted-average discount rate, operating leases	0.00%	11.47%
Weighted-average discount rate, finance leases	0.00%	13.05%

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Amount of interest expense on finance lease liability.

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Amount of amortization expense attributable to right-of-use asset from finance lease.

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Weighted average discount rate for finance lease calculated at point in time.

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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