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Note 3 - Loans Receivable and Allowance for Credit Losses on Loans - Schedule of Amortized Cost of Nonaccrual Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Nonaccrual, No Allowance |  | $ 1,705 | $ 1,357
Financing Receivable, Nonaccrual, With Allowance |  | 9,701 | 9,595
Financing Receivable, Nonaccrual | [1] | 11,406 | 10,952
Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | 1,442 | 1,357
Financing Receivable, Nonaccrual, With Allowance |  | 4,737 | 4,699
Financing Receivable, Nonaccrual | [1] | 6,179 | 6,056
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | 1,116 | 1,088
Financing Receivable, Nonaccrual, With Allowance |  | 0 | 0
Financing Receivable, Nonaccrual |  | 1,116 | 1,088
Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | 0 | 0
Financing Receivable, Nonaccrual, With Allowance |  | 4,737 | 4,699
Financing Receivable, Nonaccrual | [1] | 4,737 | 4,699
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | 156 | 173
Financing Receivable, Nonaccrual, With Allowance |  | 0 | 0
Financing Receivable, Nonaccrual | [1] | 156 | 173
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | 170 | 96
Financing Receivable, Nonaccrual, With Allowance |  | 0 | 0
Financing Receivable, Nonaccrual | [1] | 170 | 96
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  |  | 0
Financing Receivable, Nonaccrual, With Allowance |  | 2,652 | 2,213
Financing Receivable, Nonaccrual | [1] | 2,652 | 2,213
Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | 0 | 0
Financing Receivable, Nonaccrual, With Allowance |  | 2,319 | 1,863
Financing Receivable, Nonaccrual | [1] | 2,319 | 1,863
Consumer Portfolio Segment [Member] | Marine Loans [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | 0 | 0
Financing Receivable, Nonaccrual, With Allowance |  | 327 | 342
Financing Receivable, Nonaccrual | [1] | 327 | 342
Consumer Portfolio Segment [Member] | Other Consumer Loan [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | 0 | 0
Financing Receivable, Nonaccrual, With Allowance |  | 6 | 8
Financing Receivable, Nonaccrual | [1] | 6 | 8
Commercial Business Portfolio Segment [Member] |  |  |
Financing Receivable, Nonaccrual | [1] | 2,575 | 2,683
Commercial Business Portfolio Segment [Member] | Commercial And Industrial [Member] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | 263 | 0
Financing Receivable, Nonaccrual, With Allowance |  | 2,312 | 2,683
Financing Receivable, Nonaccrual | [1] | $ 2,575 | $ 2,683
[1] | Includes loans less than 90 days past due as applicable.

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