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NATURE OF OPERATIONS - Nature of Operations (Details)
$ / shares in Units, $ in Millions
Oct. 31, 2021
USD ($)
$ / shares
Jul. 31, 2021
USD ($)
$ / shares
Nov. 19, 2020
$ / shares
Nature Of Operations [Line Items]      
Cash and cash equivalents $ 81.3 $ 96.9  
Working capital deficit $ 16.7    
Preferred stock, par value (in usd per share) | $ / shares $ 0.01 $ 0.01  
Minimum | Common Stock      
Nature Of Operations [Line Items]      
Preferred stock, par value (in usd per share) | $ / shares     $ 0.65
Maximum | Common Stock      
Nature Of Operations [Line Items]      
Preferred stock, par value (in usd per share) | $ / shares     $ 0.72
Cerberus Term Loan due December 15, 2022      
Nature Of Operations [Line Items]      
Credit facility, readily available borrowing capacity $ 25.0    
Adjusted EBITDA 6.00    
Line of credit facility, fair value of amount outstanding $ 3.2    
PNC bank credit facility      
Nature Of Operations [Line Items]      
Credit facility, readily available borrowing capacity $ 8.5