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INCOME TAXES (Details 4) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
INCOME TAXES |  |
Unrecognized tax benefits, opening balance | $ 392,000 | $ 365,000
Prior period tax position increases | 0 | 0
Additions based on tax positions related to current year | 30,000 | 27,000
Unrecognized tax benefits, ending balance | $ 422,000 | $ 392,000

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