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BUSINESS COMBINATION - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 06, 2018
Dec. 31, 2019
Dec. 31, 2018
Business Combination, Consideration Transferred $ 16.7    
Business Combination Purchase Price Before Adjustments 18.0    
WellSpring Pharma Services Inc [Member]      
Business Combination, Consideration Transferred 16.7    
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual   $ 6.9  
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual   $ (5.2)  
Business Combination, Acquisition Related Costs     $ 1.1
Business Combination Purchase Price Before Adjustments $ 18.0    
Business Combination Related Party Debt Forgiveness     $ 4.4