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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, 2022
Dec. 31, 2021
Benefit obligation at beginning of year $ 32,756 $ 36,859
Other assets 645 595
Projected benefit obligation $ 17,260 $ 22,846
Discount rate – projected benefit obligation 5.40% 2.70%
Weighted average asset allocation 100.00% 100.00%
Service cost $ 5 $ 4
Accrued liabilities (16) (126)
Accumulated benefit obligation $ 17,260 $ 22,846
Discount rate – net periodic pension cost 2.70% 2.25%
Interest cost on projected benefit obligation $ 839 $ 774
Other liabilities (2,577) (3,174)
Fair value of plan assets 14,665 19,545
Actuarial loss (6,303) (2,245)
Net amount recognized (1,948) (2,705)
Benefits paid (2,506) (2,636)
Benefit obligation at end of year 24,791 32,756
Fair value of plan assets at beginning of year 30,051 32,353
Actual return on plan assets (4,768) 37
Company contributions 66 297
Benefits paid (2,506) (2,636)
Fair value of plan assets at end of year 22,843 30,051
Underfunded status of the plans $ (1,948) $ (2,705)
Minimum [Member]    
Expected long-term rate of return on plan assets 2.35% 1.80%
Maximum [Member]    
Expected long-term rate of return on plan assets 3.40% 2.95%
Equity Securities [Member]    
Weighted average asset allocation 16.00% 16.00%
Debt Securities [Member]    
Weighted average asset allocation 83.00% 81.00%
Other [Member]    
Weighted average asset allocation 1.00% 3.00%