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LEASES - Reconciliation of the undiscounted cash flows (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
LEASES    
Undiscounted cash flows of the operating lease $ 1,375  
Unamortized discount 316  
Total Operating lease liability 1,059  
Current portion of operating lease liability 90 $ 88
Operating lease liability, net of current portion $ 969 $ 992