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COMMITMENTS AND CONTINGENCIES, LEASE EXPENSE (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Lease expense        
Operating lease cost $ 113 $ 94 $ 226 $ 185
Short-term lease cost 1 2 1 4
Variable lease cost 34 32 98 59
Total lease cost $ 148 $ 128 $ 325 $ 248