Note 14 - Commitments and Contingencies (Details Textual) - USD ($)				1 Months Ended		3 Months Ended	12 Months Ended
	Oct. 17, 2025	Jul. 17, 2025	Jun. 10, 2025	Oct. 31, 2025	Sep. 30, 2025	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2027	Dec. 31, 2026	Sep. 09, 2025
Investment, Proportional Amortization Method, Elected, Amount							$ 4,100,000	$ 4,500,000
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization Expense							14,000	292,000
Investment Program, Proportional Amortization Method, Applied, Amortization Expense							13,000	251,000
Noninterest Expense							67,057,000	59,993,000
Payments for Legal Settlements							5,740,000	(0)
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process							$ 1,628,112,000	$ 1,695,823,000
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration]							Equity Securities, FV-NI	Equity Securities, FV-NI
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration]							Deferred Income Tax Expense (Benefit)	Deferred Income Tax Expense (Benefit)
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration]							Income Tax Expense (Benefit)	Income Tax Expense (Benefit)
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]							Deferred Income Tax Expense (Benefit)	Deferred Income Tax Expense (Benefit)
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]							Noninterest Income	Noninterest Income
Commercial Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process							$ 130,311,000	$ 151,493,000
Adversary Proceeding Claims With Debtors [Member]
Reorganization, Percentage of Creditors Eligible to Opt in to The Release											80.00%
Noninterest Expense					$ 5,740,000
Payments for Legal Settlements				$ 3,300,000
Proceeds of Reimbursement Related to Litigation Received From Insurance Carrier				1,700,000
Unsecured Creditor Claim				$ 30,600,000
Adversary Proceeding Claims With Debtors [Member] | Noninterest Expense [Member]
Gain (Loss) from Litigation Settlement						$ 5,750,000
Adversary Proceeding Claims With Debtors [Member] | Minimum [Member]
Litigation Settlement, Amount Awarded from Other Party		$ 2,870,000
Adversary Proceeding Claims With Debtors [Member] | Maximum [Member]
Litigation Settlement, Amount Awarded from Other Party		$ 5,740,000
Capital ABS Master Fund LP Against First Fed [Member] | The 352 Capital [Member]
Loss Contingency, Alleged Misappropriation of Funds Amount			$ 100,000,000
Capital ABS Master Fund LP Against First Fed [Member] | Minimum [Member] | The 352 Capital [Member]
Loss Contingency, Damages Sought, Value			$ 106,900,000
Socotra Complaint [Member]
Proceeds Received to Pay Down Lien	$ 4,000,000
Socotra Complaint [Member] | Commercial Portfolio Segment [Member] | Socotra [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	$ 7,700,000
Low Income Housing Tax Credit Investments [Member]
Investment Program, Proportional Amortization Method, Elected, Commitment							1,400,000	2,400,000
Investment Program, Proportional Amortization Method, Elected, Impairment Loss							0	0
Low Income Housing Tax Credit Investments [Member] | Forecast [Member]
Investment Program, Proportional Amortization Method, Elected, Commitment									$ 24,000	$ 1,300,000
Partnership Investments [Member]
Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability							2,300,000
Municipal Bonds [Member]
Investments							$ 1,250,000,000	$ 1,330,000,000
Municipal Bonds [Member] | Investments [Member] | Investment Concentration Risk [Member]
Concentration Risk, Percentage							76.90%	78.30%
US Government Agencies Debt Securities [Member]
Investments							$ 123,000,000	$ 134,700,000
US Government Agencies Debt Securities [Member] | Investments [Member] | Investment Concentration Risk [Member]
Concentration Risk, Percentage							43.40%	38.00%
US States and Political Subdivisions Debt Securities [Member]
Investments							$ 80,300,000	$ 77,900,000
US States and Political Subdivisions Debt Securities [Member] | Investments [Member] | Investment Concentration Risk [Member]
Concentration Risk, Percentage							28.30%	22.00%