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6. COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Commitments and Contingencies Disclosure [Abstract] |  |
2021 | $ 444 |
2022 | 370 |
2023 | 364 |
2024 | 218 |
Thereafter | 0 |
Total minimum payments | 1,396 |
Less: short-term lease liabilities | (551) |
Long-term lease liabilities | $ 845 | $ 951

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