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Note 9 - Long-term Debt (Details Textual) - USD ($)
Jul. 01, 2021
Mar. 15, 2021
Dec. 31, 2020
Mar. 31, 2020
Feb. 13, 2019
Long-term Line of Credit, Total       $ 20,000,000.0  
Line of Credit Facility, Interest Rate at Period End       1.92%  
Revolving Credit Facility [Member]          
Line of Credit Facility, Maximum Borrowing Capacity         $ 75,000,000
Line of Credit Facility, Additional Increase in Maximum Borrowing Capacity         25,000,000
Long-term Line of Credit, Total     $ 0    
Letter of Credit [Member]          
Line of Credit Facility, Maximum Borrowing Capacity         $ 7,500,000
Term Facility [Member]          
Debt Instrument, Face Amount   $ 130,000,000      
Debt Instrument, LIBOR Floor   1.00%      
Term Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument, Basis Spread on Variable Rate   7.00%      
Term Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Forecast [Member]          
Debt Instrument, Basis Spread on Variable Rate if Total Average Leverage Ratio is Greater or Equal to 3.25 7.00%        
Debt Instrument, Basis Spread on Variable Rate if Total Average Leverage Ratio is Less Than 3.25 6.50%        
Term Facility [Member] | Prime Rate [Member] | Forecast [Member]          
Debt Instrument, Basis Spread on Variable Rate if Total Average Leverage Ratio is Greater or Equal to 3.25 6.00%        
Debt Instrument, Basis Spread on Variable Rate if Total Average Leverage Ratio is Less Than 3.25 5.50%        
The ABL Facility [Member] | Revolving Credit Facility [Member]          
Line of Credit Facility, Maximum Borrowing Capacity   $ 150,000,000      
Line of Credit Facility, Additional Borrowing Capacity upon Request   50,000,000      
Line of Credit Facility, Remaining Borrowing Capacity   55,700,000      
Debt Instrument, Collateral Fee   75,000      
The ABL Facility [Member] | Letter of Credit [Member]          
Line of Credit Facility, Maximum Borrowing Capacity   $ 5,000,000