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Note 14 - Employee Benefit Plans - Summaries of Changes in Benefit Obligations and Plan Assets and of Funded Status of Pension Plans (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Benefit obligation at beginning of year $ 24,791 $ 32,756
Weighted average asset allocation 100.00% 100.00%
Service cost $ 0 $ 5
Interest cost on projected benefit obligation 1,236 839
Actuarial loss (54) (6,303)
Benefits paid (2,385) (2,506)
Benefit obligation at end of year 23,588 24,791
Fair value of plan assets at beginning of year 22,843 30,051
Actual return on plan assets 1,334 (4,768)
Company contributions 16 66
Benefits paid (2,385) (2,506)
Fair value of plan assets at end of year 21,808 22,843
Underfunded status of the plans (1,780) (1,948)
Other assets 849 645
Accrued liabilities (922) (16)
Other liabilities (1,707) (2,577)
Net amount recognized (1,780) (1,948)
Projected benefit obligation 16,654 17,260
Accumulated benefit obligation 16,654 17,260
Fair value of plan assets $ 14,026 $ 14,665
Discount rate – projected benefit obligation 5.10% 5.40%
Discount rate – net periodic pension cost 5.40% 2.70%
Minimum [Member]    
Expected long-term rate of return on plan assets 2.95% 2.35%
Maximum [Member]    
Expected long-term rate of return on plan assets 3.55% 3.40%
Equity Securities [Member]    
Weighted average asset allocation 17.00% 16.00%
Debt Securities [Member]    
Weighted average asset allocation 83.00% 83.00%
Other [Member]    
Weighted average asset allocation 0.00% 1.00%