Note 4 - Allowance for Credit Losses on Loans (Details Textual) - USD ($)		Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	[1]	$ 16,987,000	$ 20,449,000
Unfunded Loan Commitment [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		$ 594,000	$ 599,000

[1] Allowance for credit losses on loans in 2023 reported using the CECL method and in 2022 reported using the incurred loss method.