Note 8 - Commitments and Contingent Liabilities (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Investment, Proportional Amortization Method, Elected, Amount	$ 1,800,000		$ 1,800,000
Investment Program, Proportional Amortization Method, Applied, Amortization Expense	47,000	$ 21,000
Investment Program, Proportional Amortization Method, Elected, Commitment	1,500,000		$ 1,500,000
Insurance Policy, Aggregate Limit	3,000,000
Insurance Policy, Deductible	$ 50,000
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration]	Interest Receivable and Other Assets		Interest Receivable and Other Assets
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Noninterest Expense	Other Noninterest Expense
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]	Depreciation, Amortization and Accretion, Net	Depreciation, Amortization and Accretion, Net