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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (VIE) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Assets: |  |
Accounts receivable, net | $ 874 | $ 574
Total assets | 20,713 | 19,511
Liabilities: |  |
Accrued expenses | 2,036 | 1,639
Total liabilities | 6,551 | $ 6,306
Variable Interest Entity, Primary Beneficiary [Member] |  |
Assets: |  |
Accounts receivable, net | 538 |
Total assets | 538 |
Liabilities: |  |
Accrued expenses | 27 |
Total liabilities | 27 |
Noncontrolling Interest in Joint Venture | $ 27 |

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