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INCOME TAXES - Reconciliation of income tax provision relative to continuing operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |
Federal income tax benefit at U.S. statutory rate | 21.00% | 21.00%
State taxes, net of federal benefit | 11.00% | 8.60%
Change in valuation allowance | (36.90%) | (35.90%)
Permanent differences | (0.70%) | (0.50%)
Credits | 0.80% | 0.70%
Other |  | 6.30%
Effective Income Tax Rate Reconciliation, Percent, Total | (4.80%) | 0.20%
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |
Federal income tax benefit at U.S. statutory rate | $ (4,988) | $ (3,115)
State taxes, net of federal benefit | (2,621) | (1,279)
Change in valuation allowance | 8,775 | 5,325
Permanent differences | 168 | 77
Credits | (191) | (110)
Other | 6 | (929)
Income Tax Expense (Benefit), Total | $ 1,149 | $ (31)

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