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Note 5 - Premises and Equipment (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Depreciation, Depletion and Amortization $ 1,248,000 $ 1,412,000
Leasehold Improvements and Equipment [Member]    
Impairment of Long-Lived Assets to be Disposed of $ 358,000