Note 3 - Loans Receivable and Allowance for Credit Losses - Loans - Schedule of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Financing Receivable, Gross	$ 2,629,657	$ 2,533,821
Commercial Real Estate [Member]
Financing Receivable, Gross	11,197	7,750
Residential Real Estate [Member]
Financing Receivable, Gross	2,116	425
Other Nonreal Estate [Member]
Financing Receivable, Gross	5,021	5,412
Collateral Dependent Loans [Member]
Financing Receivable, Gross	18,334	13,587
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Gross	932,689	871,337
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	11,197	7,750
Commercial Real Estate Portfolio Segment [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	11,197	7,750
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member]
Financing Receivable, Gross	170,714	170,396
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	2,047	2,771
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	2,047	2,771
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member]
Financing Receivable, Gross	326,684	280,798
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	9,150	4,979
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	9,150	4,979
Residential Portfolio Segment [Member]
Financing Receivable, Gross	769,903	742,371
Residential Portfolio Segment [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	2,116	425
Residential Portfolio Segment [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	2,116	425
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member]
Financing Receivable, Gross	629,712	617,322
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	1,799	164
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	1,799	164
Residential Portfolio Segment [Member] \| Home Equity Loan [Member]
Financing Receivable, Gross	86,895	75,147
Residential Portfolio Segment [Member] \| Home Equity Loan [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| Home Equity Loan [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	317	261
Residential Portfolio Segment [Member] \| Home Equity Loan [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| Home Equity Loan [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	317	261
Consumer Portfolio Segment [Member]
Financing Receivable, Gross	600,779	620,181
Consumer Portfolio Segment [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Consumer Portfolio Segment [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Consumer Portfolio Segment [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	4,422	1,966
Consumer Portfolio Segment [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	4,422	1,966
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member]
Financing Receivable, Gross	527,597	541,946
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	3,802	1,677
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	3,802	1,677
Consumer Portfolio Segment [Member] \| Marine Loans [Member]
Financing Receivable, Gross	70,220	74,931
Consumer Portfolio Segment [Member] \| Marine Loans [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Consumer Portfolio Segment [Member] \| Marine Loans [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Consumer Portfolio Segment [Member] \| Marine Loans [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	620	289
Consumer Portfolio Segment [Member] \| Marine Loans [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	620	289
Commercial Business Portfolio Segment [Member]
Financing Receivable, Gross	326,286	299,932
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member]
Financing Receivable, Gross	311,173	287,014
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	599	3,446
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	$ 599	$ 3,446

Note 3 - Loans Receivable and Allowance for Credit Losses - Loans - Schedule of Collateral Dependent Loans (Details) - USD ($)
$ in Thousands

Sep. 30, 2025

Dec. 31, 2024

Financing Receivable, Gross

$ 2,629,657

$ 2,533,821

Commercial Real Estate [Member]

Financing Receivable, Gross

11,197

7,750

Residential Real Estate [Member]

Financing Receivable, Gross