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STOCK-BASED COMPENSATION - Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
STOCK-BASED COMPENSATION    
Stock compensation expense $ 68 $ 135
General and Administrative Expense [Member]    
STOCK-BASED COMPENSATION    
Stock compensation expense $ 12 $ 26