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Note 10 - Derivative Financial Instruments - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Jun. 30, 2023
Interest Rate Swap Effective February 6, 2023 [Member]    
Notional Amount $ 25,000  
Fixed Rate 2.80%  
Maturity Aug. 06, 2023  
Fair Value, Liability $ 0 $ 59
Interest Rate Swaps Effective February 23, 2023 [Member]    
Notional Amount $ 100,000  
Fixed Rate 0.86%  
Maturity Mar. 23, 2025  
Fair Value, Liability $ 4,394 6,716
Interest Rate Swap Effective April 24, 2020 [Member]    
Notional Amount $ 25,000  
Fixed Rate 0.88%  
Fair Value, Liability $ 1,181 1,777
Interest Rate Swap Effective February 24, 2023 [Member]    
Notional Amount $ 25,000  
Fixed Rate 0.86%  
Maturity Mar. 24, 2025  
Fair Value, Liability $ 1,102 1,683
Interest Rate Swaps Effective May 25, 2023 [Member]    
Notional Amount  
Fair Value, Liability $ 6,677 $ 10,235