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Note 4 - Loans, Allowance for Credit Losses and Credit Quality - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025
Balance | $ 10,255 |  | $ 8,884 |  | $ 8,884
Charge-offs | 0 |  | (82) |  |
Recoveries | 0 |  | 0 |  |
(Benefit) provision | 157 |  | 6 |  |
Balance | 10,412 | [1] | 8,808 | [1] | 10,255
Real Estate Portfolio Segment [Member] | One-to-four Family Residential Loan [Member] |  |  |  |  |
Balance | 3,069 |  | 2,928 |  | 2,928
Charge-offs | 0 |  | 0 |  | 0
Recoveries | 0 |  | 0 |  |
(Benefit) provision | 103 |  | (230) |  |
Balance | 3,172 | [1] | 2,698 | [1] | 3,069
Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] |  |  |  |  |
Balance | 2,260 |  | 2,422 |  | 2,422
Charge-offs | 0 |  | 0 |  | 0
Recoveries | 0 |  | 0 |  |
(Benefit) provision | (39) |  | 210 |  |
Balance | 2,221 | [1] | 2,632 | [1] | 2,260
Real Estate Portfolio Segment [Member] | Commercial Loan [Member] |  |  |  |  |
Balance | 3,640 |  | 2,260 |  | 2,260
Charge-offs | 0 |  | 0 |  | 0
Recoveries | 0 |  | 0 |  |
(Benefit) provision | 10 |  | 272 |  |
Balance | 3,650 | [1] | 2,532 | [1] | 3,640
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Balance | 170 |  | 118 |  | 118
Charge-offs | 0 |  | 0 |  | 0
Recoveries | 0 |  | 0 |  |
(Benefit) provision | 5 |  | 1 |  |
Balance | 175 | [1] | 119 | [1] | 170
Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Balance | 1,009 |  | 1,036 |  | 1,036
Charge-offs | 0 |  | 0 |  | 0
Recoveries | 0 |  | 0 |  |
(Benefit) provision | 87 |  | (328) |  |
Balance | 1,096 | [1] | 708 | [1] | 1,009
Other Portfolio Segment [Member] | Commercial Loan [Member] |  |  |  |  |
Charge-offs |  |  |  |  | (81)
Other Portfolio Segment [Member] | Commercial Loans [Member] |  |  |  |  |
Balance | 102 |  | 119 |  | 119
Charge-offs | 0 |  | (81) |  |
Recoveries | 0 |  | 0 |  |
(Benefit) provision | (5) |  | 80 |  |
Balance | 97 |  | 118 |  | 102
Other Portfolio Segment [Member] | Consumer Loan [Member] |  |  |  |  |
Balance | 5 |  | 1 |  | 1
Charge-offs | 0 |  | (1) |  | (6)
Recoveries | 0 |  | 0 |  |
(Benefit) provision | (4) |  | 1 |  |
Balance | $ 1 | [1] | $ 1 | [1] | $ 5
[1] | Balances of accrued interest receivable excluded from amortized cost and the calculation of allowance for credit losses amounted to $4.6 million as of March 31, 2026 and December 31, 2025.

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