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DEBT - MidCap Credit Facility and Cerberus Credit Facility (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 09, 2020
Mar. 30, 2020
Dec. 31, 2019
Dec. 15, 2017
Jan. 31, 2021
Jul. 31, 2021
Jul. 01, 2021
Jun. 02, 2021
Dec. 08, 2020
Jul. 31, 2020
Mar. 29, 2020
Debt Instrument [Line Items]                      
Unused line fee     0.50%                
Aggregate amount of each consecutive quarterly scheduled principal installment       $ 1,500,000              
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        
Cerberus Credit Facility                      
Debt Instrument [Line Items]                      
Line of credit facility, term       5 years              
Proceeds from long-term debt       $ 393,000,000.0              
Revolving credit facility       $ 25,000,000.0              
Leverage ratio       3.50%              
Principal deferral amount   $ 3,000,000.0                  
Maximum amount borrower may distribute for management fees and tax sharing   5,000,000.0                  
Liquidity requirement   14,500,000                 $ 15,000,000.0
Principal amount outstanding on the Term Loan           364,330,000       371,972,000  
Cerberus Credit Facility | Base Rate                      
Debt Instrument [Line Items]                      
Debt instrument, percentage points added to the reference rate       3.75%              
Cerberus Credit Facility | London Interbank Offered Rate (LIBOR)                      
Debt Instrument [Line Items]                      
Debt instrument, percentage points added to the reference rate       6.50%              
Cerberus Credit Facility | Scenario 1                      
Debt Instrument [Line Items]                      
Excess cash flow payment percentage       50.00%              
Principal payments extinguished   $ 4,300,000                  
Cerberus Credit Facility | Line of Credit                      
Debt Instrument [Line Items]                      
Line of credit facility, maximum credit commitment           25,000,000.0       25,000,000.0  
Long-term line of credit           0       0  
Cerberus Credit Facility | Term Loan                      
Debt Instrument [Line Items]                      
Principal amount outstanding on the Term Loan           364,330,000       371,972,000  
Current and long-term net           $ 363,791,000       $ 370,995,000  
Rate Applicable When Leverage Ratio is Below 3.50 | Cerberus Credit Facility | Scenario 2                      
Debt Instrument [Line Items]                      
Excess cash flow payment percentage       25.00%