Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY - Additional Information 1 (Details)

v3.20.2
STOCKHOLDERS' EQUITY - Additional Information 1 (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 06, 2020
Sep. 30, 2019
Sep. 26, 2019
Feb. 29, 2020
Sep. 30, 2019
May 31, 2020
May 31, 2019
May 31, 2020
May 31, 2019
Aug. 31, 2019
Stockholders Equity [Line Items]                    
Preferred stock, shares authorized           10,000   10,000   10,000
Preferred stock, par value (in dollars per share)           $ 0.001   $ 0.001   $ 0.001
Preferred stock, shares issued           0   0   0
Preferred stock, shares outstanding           0   0   0
Common stock, shares authorized           265,000   265,000   265,000
Common stock, par value (in dollars per share)           $ 0.001   $ 0.001   $ 0.001
Common stock, shares issued           119,933   119,933   90,041
Common stock, shares outstanding           119,933   119,933   90,041
Share-based Payment Arrangement, Noncash Expense               $ 11,074 $ 8,839  
Common Stock                    
Stockholders Equity [Line Items]                    
Share-based Payment Arrangement, Noncash Expense           $ 2,985 $ 2,667 $ 11,074 $ 8,839  
Securities Purchase Agreement (the "Purchase Agreement")                    
Stockholders Equity [Line Items]                    
Issuance of common stock and warrants for cash, net of offering costs (in shares) 10,000   17,198              
Warrants exercise price $ 1.60 $ 2.25 $ 1.75 $ 2.00 $ 2.25          
Gross proceeds from the Offering $ 16,000 $ 30,100                
Term Of Warrants Exercisable       5 years 5 years          
Net Proceeds After Deducting Placement Agent Fees And Estimated Offering Expense       $ 14,600 $ 27,400