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LEASES - Lease Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease costs $ 124 $ 115
Amortization of right-of-use assets 216 57
Interest on lease liabilities 22 8
Variable lease costs 13 16
Total lease costs $ 375 $ 196