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Note 10 - Fair Value Measurements (Details Textual) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Other Real Estate $ 0 $ 0
Fair Value, Nonrecurring [Member]    
Financial Liabilities Fair Value Disclosure 0 0
Collateral Pledged [Member]    
Financing Receivable, Allowance for Credit Loss $ 459,000 $ 0