Note 3 - Loans Receivable and Allowance for Credit Losses - Loans - Schedule of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Gross	$ 2,614,461	$ 2,533,821
Commercial Real Estate [Member]
Financing Receivable, Gross	11,129	7,750
Residential Real Estate [Member]
Financing Receivable, Gross	2,060	425
Other Nonreal Estate [Member]
Financing Receivable, Gross	5,794	5,412
Collateral Dependent Loans [Member]
Financing Receivable, Gross	18,983	13,587
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Gross	916,137	871,337
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	11,129	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	11,129	7,750
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member]
Financing Receivable, Gross	180,250	170,396
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	2,046	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	2,046	2,771
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member]
Financing Receivable, Gross	300,723	280,798
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	9,083	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	9,083	4,979
Residential Portfolio Segment [Member]
Financing Receivable, Gross	779,518	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	2,060	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	2,060	425
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member]
Financing Receivable, Gross	639,881	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	1,809	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	1,809	164
Residential Portfolio Segment [Member] \| Home Equity Loan [Member]
Financing Receivable, Gross	85,613	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	251	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	251	261
Consumer Portfolio Segment [Member]
Financing Receivable, Gross	606,291	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	3,932	1,966
Consumer Portfolio Segment [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	3,932	1,966
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member]
Financing Receivable, Gross	530,375	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	3,365	1,677
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	3,365	1,677
Consumer Portfolio Segment [Member] \| Marine Loans [Member]
Financing Receivable, Gross	72,765	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	567	289
Consumer Portfolio Segment [Member] \| Marine Loans [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	567	289
Commercial Business Portfolio Segment [Member]
Financing Receivable, Gross	312,515	299,932
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member]
Financing Receivable, Gross	294,563	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	1,862	3,446
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	$ 1,862	$ 3,446

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

Jun. 30, 2025

Dec. 31, 2024

Financing Receivable, Gross

$ 2,614,461

$ 2,533,821

Commercial Real Estate [Member]

Financing Receivable, Gross

11,129

7,750

Residential Real Estate [Member]

Financing Receivable, Gross