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SUBSEQUENT EVENTS - Exercise of Warrants (Details) - USD ($)
Oct. 10, 2020
Jul. 09, 2020
Sep. 30, 2020
Aug. 07, 2020
Mar. 31, 2020
Dec. 31, 2019
Dec. 20, 2019
Jun. 21, 2019
Jun. 20, 2019
Mar. 15, 2019
Subsequent Event [Line Items]                    
Exercise price of warrants (in dollars per share)       $ 0.50            
Series A warrants                    
Subsequent Event [Line Items]                    
Number of shares called by warrants exercised (in shares)   50,000 1,286,021   1,336,021     1,336,021 1,336,021  
Exercise price of warrants (in dollars per share)   $ 1.50       $ 1.50 $ 3.72   $ 3.72  
Gross proceeds from warrant exercises   $ 75,000                
Common stock [Member]                    
Subsequent Event [Line Items]                    
Number of shares called by warrants exercised (in shares)                   300,000
Common stock [Member] | Series A warrants                    
Subsequent Event [Line Items]                    
Number of shares called by warrants exercised (in shares)               1,336,021    
Subsequent event | Series A warrants                    
Subsequent Event [Line Items]                    
Number of shares called by warrants exercised (in shares) 337,500                  
Gross proceeds from warrant exercises $ 168,750                  
Subsequent event | Common stock [Member] | Series A warrants                    
Subsequent Event [Line Items]                    
Exercise price of warrants (in dollars per share) $ 0.50