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Debt - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Apr. 30, 2021
Sep. 30, 2021
Jun. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Apr. 29, 2021
Debt Instrument [Line Items]              
Loss on extinguishment of debt   $ 0   $ 0 $ 460,000 $ 0  
Amended Credit Agreement              
Debt Instrument [Line Items]              
Debt instrument, term 5 years            
Debt issuance costs $ 1,100,000            
Prior Credit Agreement              
Debt Instrument [Line Items]              
Loss on extinguishment of debt     $ 500,000        
Revolving Credit Facility | Amended Credit Agreement              
Debt Instrument [Line Items]              
Maximum borrowing capacity $ 100,000,000            
Remaining borrowing capacity   $ 86,500,000     $ 86,500,000    
Interest rate at period end   1.50%     1.50%    
Revolving Credit Facility | Amended Credit Agreement | Minimum              
Debt Instrument [Line Items]              
Unused fee percentage 0.10%            
Revolving Credit Facility | Amended Credit Agreement | Maximum              
Debt Instrument [Line Items]              
Unused fee percentage 0.30%            
Revolving Credit Facility | Amended Credit Agreement | Minimum Floor              
Debt Instrument [Line Items]              
Basis spread on variable rate 0.00%            
Revolving Credit Facility | Amended Credit Agreement | London Interbank Offered Rate (LIBOR) | Minimum              
Debt Instrument [Line Items]              
Basis spread on variable rate 1.25%            
Revolving Credit Facility | Amended Credit Agreement | London Interbank Offered Rate (LIBOR) | Maximum              
Debt Instrument [Line Items]              
Basis spread on variable rate 2.125%            
Revolving Credit Facility | Amended Credit Agreement | Base Rate | Minimum              
Debt Instrument [Line Items]              
Basis spread on variable rate 0.25%            
Revolving Credit Facility | Amended Credit Agreement | Base Rate | Maximum              
Debt Instrument [Line Items]              
Basis spread on variable rate 1.125%            
Revolving Credit Facility | Prior Credit Agreement              
Debt Instrument [Line Items]              
Maximum borrowing capacity             $ 50,000,000
Letter of Credit | Amended Credit Agreement              
Debt Instrument [Line Items]              
Maximum borrowing capacity $ 7,000,000            
Swing Line of Credit | Amended Credit Agreement              
Debt Instrument [Line Items]              
Maximum borrowing capacity 5,000,000            
Term Loan | Amended Credit Agreement              
Debt Instrument [Line Items]              
Maximum borrowing capacity $ 100,000,000            
Interest rate at period end   1.50%     1.50%    
Term Loan | Amended Credit Agreement | Minimum Floor              
Debt Instrument [Line Items]              
Basis spread on variable rate 0.00%            
Term Loan | Amended Credit Agreement | London Interbank Offered Rate (LIBOR) | Minimum              
Debt Instrument [Line Items]              
Basis spread on variable rate 1.25%            
Term Loan | Amended Credit Agreement | London Interbank Offered Rate (LIBOR) | Maximum              
Debt Instrument [Line Items]              
Basis spread on variable rate 2.125%            
Term Loan | Amended Credit Agreement | Base Rate | Minimum              
Debt Instrument [Line Items]              
Basis spread on variable rate 0.25%            
Term Loan | Amended Credit Agreement | Base Rate | Maximum              
Debt Instrument [Line Items]              
Basis spread on variable rate 1.125%            
Term Loan | Prior Credit Agreement              
Debt Instrument [Line Items]              
Maximum borrowing capacity             $ 165,000,000