Quarterly report pursuant to Section 13 or 15(d)

DEBT - Long-term Debt (Details)

v3.20.2
DEBT - Long-term Debt (Details)
Apr. 29, 2019
USD ($)
May 31, 2020
$ / shares
Nov. 08, 2019
USD ($)
Aug. 31, 2019
$ / shares
Aug. 21, 2019
$ / shares
shares
Line of Credit Facility [Line Items]          
Common stock, par value | $ / shares   $ 0.001   $ 0.001  
Exchange Agreement          
Line of Credit Facility [Line Items]          
Warrants issued | shares         650
Warrants exercise price | $ / shares         $ 4.25
Second Exchange Agreement          
Line of Credit Facility [Line Items]          
Aggregate principal amount     $ 24,000,000.0    
Issue discount     $ 1,500,000    
Percentage of outstanding principal for repayment     1.20    
Private placement offering (the "Private Placement") | Securities Purchase Agreement (the "Purchase Agreement")          
Line of Credit Facility [Line Items]          
Aggregate principal amount $ 21,300,000        
Issue discount 1,300,000        
Proceeds from private placement $ 20,000,000.0