Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY AND LOSS PER SHARE (Details)

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STOCKHOLDERS' EQUITY AND LOSS PER SHARE (Details) - USD ($)
3 Months Ended
Feb. 11, 2020
Feb. 10, 2020
Feb. 06, 2020
Aug. 09, 2019
Jul. 31, 2019
Mar. 31, 2020
Sep. 30, 2019
Mar. 31, 2019
Dec. 31, 2019
Class of Stock [Line Items]                  
Common stock, shares authorized (in shares)           100,000,000     100,000,000
New shares issued (in shares)         3,960,560   2,766,798    
Common stock, par value (in dollars per share)           $ 0.001     $ 0.001
Share price (in dollars per share)         $ 2.53        
Net proceeds from the sale of common stock from underwritten public offering         $ 10,000,000 $ 26,460,000   $ 0  
Net proceeds from units issued in the period $ 28,800,000     $ 3,000,000 $ 9,900,000 26,460,000      
Shares, outstanding (in shares)       1,193,762          
Gross proceeds from the second closing             $ 7,000,000    
Proceeds from issuance of common stock $ 26,500,000                
Consideration received from sale of stock           $ 28,800,000      
Preferred stock, shares authorized (in shares)           3,000,000     3,000,000
Loss Per Share                  
Total shares excluded from net loss per share attributable to common stockholders (in shares)           7,113,091   7,087,528  
Common stock warrants                  
Loss Per Share                  
Total shares excluded from net loss per share attributable to common stockholders (in shares)           2,134,362   3,245,100  
Common stock options                  
Loss Per Share                  
Total shares excluded from net loss per share attributable to common stockholders (in shares)           1,216,765   1,294,028  
Non-vested restricted stock unit awards                  
Loss Per Share                  
Total shares excluded from net loss per share attributable to common stockholders (in shares)           3,761,964   2,548,400  
Underwritten Public Offering                  
Class of Stock [Line Items]                  
New shares issued (in shares) 19,166,667   16,666,667            
Common stock, par value (in dollars per share)     $ 0.001            
Share price (in dollars per share)     $ 1.50            
Shelf registration statement, maximum aggregate proceeds           $ 50,000,000.0      
Number of shares issued (in shares)           19,166,667      
Remaining amount available           $ 21,200,000      
Over-Allotment Option                  
Class of Stock [Line Items]                  
New shares issued (in shares) 2,500,000 2,500,000