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Note 13 - Employee Benefit Plans (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 1998
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Contribution Plan, Employer Discretionary Contribution Amount   $ 693,000 $ 683,000 $ 643,000
Stock Purchased by Employee Stock Ownership Plan, Shares 61,501      
Employee Stock Ownership Plan (ESOP) Loan Payments From ESOP Loan Term (Year) 10 years      
Employee Stock Ownership Plan (ESOP), Compensation Expense   $ 0    
Employee Stock Ownership Plan (ESOP), Number of Allocated Shares   48,704 48,435  
Stock Issued During Period, Value, Employee Stock Purchase Plan   $ 1,600,000 $ 1,400,000