Note 9 - Income Taxes - Tax Credits and Other Tax Benefits Recognized and Amortization Expense Related to Tax Credit Partnerships (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Tax credits and other tax benefits recognized	$ 12,390	$ 417
Tax credits and other tax benefits recognized	$ 0	$ 1,598
Provision for Income Taxes [Member]
Amortization expense in provision for income taxes	Income tax benefit	Income tax benefit
Amortization expense in provision for income taxes	Income tax benefit	Income tax benefit
Amortization expense	$ 9,268	$ 3,295
Amortization expense	$ 0	$ 0
Other Non-interest Expense [Member]
Amortization expense in provision for income taxes	Other	Other
Amortization expense in provision for income taxes	Other	Other
Amortization expense	$ 0	$ 1,294
Amortization expense	$ 0	$ 0