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Debt (Details)
6 Months Ended
Nov. 30, 2018
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
Dec. 31, 2020
USD ($)
May 07, 2020
USD ($)
Short-term Debt [Line Items]          
Long-term debt   $ 8,995,000   $ 12,748,000  
Unamortized debt issuance cost   900,000      
Financing Security Agreement | Base Rate | Minimum          
Short-term Debt [Line Items]          
Interest rate spread 0.25%        
Financing Security Agreement | Base Rate | Maximum          
Short-term Debt [Line Items]          
Interest rate spread 1.25%        
Financing Security Agreement | LIBOR          
Short-term Debt [Line Items]          
Interest rate spread 1.00%        
Financing Security Agreement | LIBOR | Minimum          
Short-term Debt [Line Items]          
Interest rate spread 1.25%        
Financing Security Agreement | LIBOR | Maximum          
Short-term Debt [Line Items]          
Interest rate spread 2.25%        
Financing Security Agreement | Overnight Bank Funding Rate          
Short-term Debt [Line Items]          
Interest rate spread 0.50%        
Revolving Credit Facility          
Short-term Debt [Line Items]          
Long-term debt   9,000,000.0      
Available borrowings   $ 91,700,000      
Weighted average interest rate   1.60% 3.20%    
Revolving Credit Facility | Financing Security Agreement | Line of Credit          
Short-term Debt [Line Items]          
Borrowing capacity $ 200,000,000       $ 140,000,000
Leverage ratio   0.3      
Minimum interest expense coverage   19.5     3.0
Revolving Credit Facility | Financing Security Agreement | Line of Credit | Fiscal Quarters After March 31, 2021          
Short-term Debt [Line Items]          
Leverage ratio         3.00
Revolving Credit Facility | Financing Security Agreement | Line of Credit | Minimum | Fiscal Quarters Through December 31, 2020          
Short-term Debt [Line Items]          
Leverage ratio         3.0
Revolving Credit Facility | Financing Security Agreement | Line of Credit | Maximum | Fiscal Quarters Through December 31, 2020          
Short-term Debt [Line Items]          
Leverage ratio         3.75
Revolving Credit Facility | Financing Security Agreement | Foreign Line of Credit          
Short-term Debt [Line Items]          
Borrowing capacity 20,000,000        
Revolving Credit Facility | Financing Security Agreement | Accordion Feature          
Short-term Debt [Line Items]          
Borrowing capacity 100,000,000        
Revolving Credit Facility | Financing Security Agreement | Letter of Credit          
Short-term Debt [Line Items]          
Borrowing capacity 20,000,000        
Revolving Credit Facility | Financing Security Agreement | Swing Line Loan Credit          
Short-term Debt [Line Items]          
Borrowing capacity $ 20,000,000