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ACCRUED LIABILITIES - Accrued Liabilities on the Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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ACCRUED LIABILITIES. |  |
Royalties payable | $ 1,151 | $ 1,151
Other Accrued Liabilities | 812 | 978
Total accrued Liabilities | $ 1,963 | $ 2,129

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