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MERGER AND FINANCING - Narrative (Details)
12 Months Ended
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
Business Acquisition [Line Items]    
Proceeds from issuance of common stock $ 18,132,661 $ 0
Net proceeds from issuance of common stock after deduction of stock issuance costs 16,500,000  
Placement agent fees $ 1,600,000  
Warrant term 5 years  
Number of warrants issued | shares 1,400,000  
Warrants issued with common stock $ 1,995,000  
Warrants issued to placement agents $ 913,000  
Warrant    
Business Acquisition [Line Items]    
Exercise price of warrants or rights (in dollars per share) | $ / shares $ 3.18  
Measurement Input, Expected Dividend Rate    
Business Acquisition [Line Items]    
Measurement input 0.000  
Measurement Input, Price Volatility    
Business Acquisition [Line Items]    
Measurement input 0.848  
Measurement Input, Risk Free Interest Rate    
Business Acquisition [Line Items]    
Measurement input 0.025  
Placement Agent    
Business Acquisition [Line Items]    
Number of warrants issued to placement agents | shares 349,555  
Placement Agent | Warrant    
Business Acquisition [Line Items]    
Exercise price of warrants or rights (in dollars per share) | $ / shares $ 2.54  
Affiliates    
Business Acquisition [Line Items]    
Number of warrants issued to affiliates | shares 279,862  
Affiliates | Warrant    
Business Acquisition [Line Items]    
Exercise price of warrants or rights (in dollars per share) | $ / shares $ 3.18  
Convertible Promissory Notes    
Business Acquisition [Line Items]    
Aggregate principal amount $ 8,600,000  
Conversion price | $ / shares $ 0.72  
Conversion discount percentage 25.00%  
Beneficial conversion feature $ 3,100,000  
Accrued Interest    
Business Acquisition [Line Items]    
Aggregate principal amount $ 582,000