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DEBT - MidCap Credit Facility (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 09, 2020
Dec. 31, 2019
Jan. 31, 2021
Jul. 31, 2021
Jul. 01, 2021
Jun. 02, 2021
Dec. 08, 2020
Jul. 31, 2020
Debt Instrument [Line Items]                
Unused line fee   0.50%            
MidCap Credit Facility                
Debt Instrument [Line Items]                
Line of credit facility, term       3 years        
Line of credit facility, maximum credit commitment   $ 12,500,000            
Debt instrument, percentage points added to the reference rate   4.00%            
Long-term line of credit       $ 0       $ 0
Credit facility, readily available borrowing capacity       $ 8,700,000        
MidCap Credit Facility | Letter of Credit Sublimit                
Debt Instrument [Line Items]                
Line of credit facility, maximum credit commitment   $ 5,000,000            
MidCap Credit Facility | Inventory Sublimit                
Debt Instrument [Line Items]                
Line of credit facility, maximum credit commitment   $ 4,500,000            
First Amendment to the Credit Facility                
Debt Instrument [Line Items]                
Dividends cash $ 50,000,000              
Dividends     $ 40,000,000          
Minimum liquidity required $ 3,000,000              
Percentage of eligible accounts 75.00%           50.00%  
Second Amendment to the Credit Facility                
Debt Instrument [Line Items]                
Unused line fee           0.65%    
Third Amendment to the Credit Facility                
Debt Instrument [Line Items]                
Increase to effective cap on eligibility of unpaid Eligible Accounts         $ 8,000,000