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SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)
3 Months Ended
Mar. 31, 2019
USD ($)
Segment
Mar. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Significant Accounting Policies [Line Items]      
Marketable securities, weighted average remaining maturity 3 months 6 days    
Restricted cash balances as collateral for corporate credit cards $ 100,000 $ 100,000 $ 100,000
Equipment estimated useful life 3 years    
Impairment of Long-Lived Assets $ 0 0  
Impairment of goodwill 0 0  
Revenues from product sales to date $ 0    
Number of operating segments | Segment 1    
Right-of-use assets $ 371,370    
ASC 842      
Significant Accounting Policies [Line Items]      
Operating lease liabilities 400,000    
Right-of-use assets 400,000    
In-Process Research and Development      
Significant Accounting Policies [Line Items]      
Asset impairment charges $ 0 $ 0