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Note 5 - Bank Debt (Details Textual)
$ in Thousands
1 Months Ended 2 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 13, 2023
USD ($)
Apr. 15, 2020
USD ($)
Mar. 31, 2023
USD ($)
Mar. 12, 2023
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2023
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Mar. 25, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jul. 23, 2021
USD ($)
Long-Term Debt, Gross               $ 85,213   $ 111,738  
Debt Issuance Costs, Net, Total               $ 2,469   3,973  
Leverage Ratio               2.05      
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap [Member]                      
Derivative, Basis Spread on Variable Rate               4.00%      
Credit Agreement [Member]                      
Debt Instrument, Increase (Decrease), Net, Total               $ 26,500      
Debt Instrument, Liquidity               32,100      
Letters of Credit Outstanding, Amount               11,200      
Debt Issuance Costs, Net, Total               $ 2,500 $ 2,100 $ 4,000  
Debt Instrument, Covenant, Debt Service Coverage Ratio               1.49      
Credit Agreement [Member] | Interest Rate Swap [Member]                      
Derivative, Fixed Interest Rate               2.92%      
Credit Agreement [Member] | Term Loan [Member]                      
Long-Term Debt, Gross               $ 5,500      
Credit Agreement [Member] | Minimum [Member]                      
Debt Instrument, Covenant, Debt Service Coverage Ratio               1.25      
Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]                      
Debt Instrument, Variable Rate Floor   0.50%                  
Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]                      
Debt Instrument, Basis Spread on Variable Rate   2.75%                  
Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]                      
Debt Instrument, Basis Spread on Variable Rate   4.00%                  
Credit Agreement [Member] | Forecast [Member] | Term Loan [Member]                      
Debt Instrument, Periodic Payment, Total         $ 5,000   $ 10,000        
Credit Agreement [Member] | Forecast [Member] | Secured Overnight Financing Rate (SOFR) [Member]                      
Debt Instrument, Basis Spread on Variable Rate           4.00%          
Credit Agreement [Member] | Post Amendment [Member] | Term Loan [Member]                      
Line of Credit Facility, Maximum Borrowing Capacity               $ 85,000      
Long-Term Debt, Gross               40,500      
Proceeds from Issuance of Debt               44,700      
Credit Agreement [Member] | Subsequent Event [Member] | Term Loan [Member]                      
Debt Instrument, Periodic Payment, Total     $ 5,500                
Credit Agreement [Member] | Subsequent Event [Member] | Secured Overnight Financing Rate (SOFR) [Member] | Minimum [Member]                      
Debt Instrument, Basis Spread on Variable Rate 4.00%                    
Credit Agreement [Member] | Subsequent Event [Member] | Secured Overnight Financing Rate (SOFR) [Member] | Maximum [Member]                      
Debt Instrument, Basis Spread on Variable Rate 5.00%                    
Credit Agreement [Member] | Revolving Credit Facility [Member]                      
Line of Credit Facility, Maximum Borrowing Capacity               120,000      
Long-Term Line of Credit, Total               79,700      
Debt Instrument, Unused Borrowing Capacity, Amount               29,100      
Credit Agreement [Member] | Revolving Credit Facility [Member] | Interest Rate Swap [Member]                      
Derivative, Notional Amount               $ 52,700      
Credit Agreement [Member] | Revolving Credit Facility [Member] | Forecast [Member]                      
Debt Instrument, Covenant, Maximum Annual Capital Expenditures             $ 75,000        
Credit Agreement [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]                      
Debt Instrument, Amount to be Converted $ 35,000                    
Line of Credit Facility, Maximum Borrowing Capacity $ 85,000                    
Proceeds from Lines of Credit, Total       $ 17,000              
Paycheck Protection Program CARES Act [Member]                      
Proceeds from Notes Payable, Total   $ 10,000                  
Notes Payable, Total                     $ 10,000