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DEBT - Additional Information (Details)
9 Months Ended
Feb. 28, 2019
USD ($)
$ / shares
Apr. 30, 2022
USD ($)
Mar. 16, 2022
USD ($)
Jul. 31, 2021
USD ($)
Debt Instrument [Line Items]        
Long-term debt   $ 10,481,000   $ 9,147,000
Debt instrument, interest rate, effective percentage   27.80%    
Umpqua Revolver        
Debt Instrument [Line Items]        
Line of credit facility, maximum credit commitment   $ 12,500,000 $ 12,500,000  
Line of credit facility, sublimit borrowing capacity   5,000,000 5,000,000  
MidCap Credit Facility        
Debt Instrument [Line Items]        
Line of credit facility, termination amount     $ 12,500,000  
Credit facility, readily available borrowing capacity   12,200,000    
SPHG Holdings        
Debt Instrument [Line Items]        
Conversion to common stock $ 1,000      
Conversion ratio (shares) 0.4212655      
Initial conversion price (in usd per share) | $ / shares $ 2.37      
7.50% Convertible Senior Note due March 1, 2024 | SPHG Holdings        
Debt Instrument [Line Items]        
Debt instrument, stated interest rate 7.50%      
Principal amount of note $ 14,900,000 $ 14,940,000   14,940,000
Debt instrument amortization period   22 months    
Long-term debt   $ 10,572,000   $ 9,343,000