ACCRUED LIABILITIES - Accrued Liabilities on the Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ACCRUED LIABILITIES.
Royalties payable	$ 1,151	$ 1,151
Other Accrued Liabilities	978	1,218
Total accrued Liabilities	$ 2,129	$ 2,369