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LEASES - Cash and Non-Cash Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating    
Cash paid for lease liabilities $ 110 $ 106
Finance    
Cash paid for lease liabilities 251 68
Lease Remeasurement    
Operating    
Right-of-use assets capitalized and lease liabilities 0 207
Finance    
Right-of-use assets capitalized and lease liabilities 0 0
Lease Execution    
Operating    
Right-of-use assets capitalized and lease liabilities 0 28
Finance    
Right-of-use assets capitalized and lease liabilities 0 710
Topic 842    
Operating    
Right-of-use assets capitalized and lease liabilities 0 212
Finance    
Right-of-use assets capitalized and lease liabilities $ 0 $ 0