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WARRANT LIABILITY - Changes in Level 3 Liabilities Measured at Fair Value (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
WARRANT LIABILITY    
Balance $ 49,000 $ 9,000
Change in fair value of warrant liability (18,000) 40,000
Balance $ 31,000 $ 49,000