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Loans Receivable and Allowance for Credit Losses - Loans receivable (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
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Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Total Loans Receivable | $ 380,572 |  | $ 368,253 |  |  |
Allowance for Credit Losses | (1,699) | $ (1,699) | (1,699) | $ (1,699) | $ (2,699) | $ (2,802)
Net Deferred Loan Costs | 734 |  | 779 |  |  |
Loans Receivable, Net | 379,607 |  | 367,333 |  |  |
One-to-Four Family Mortgages |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Total Loans Receivable | 334,322 |  | 332,659 |  |  |
Allowance for Credit Losses | (1,268) | (1,441) | (1,526) | (1,273) | (2,454) | (2,554)
Home Equity Lines of Credit |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Total Loans Receivable | 9,833 |  | 7,952 |  |  |
Allowance for Credit Losses | (44) | (43) | (45) | (57) | (54) | (57)
Construction Loans |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Total Loans Receivable | 14,711 |  | 9,588 |  |  |
Allowance for Credit Losses | (26) | (26) | (13) | (7) | (32) | (32)
Consumer Loans |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Total Loans Receivable | 3,968 |  | 3,699 |  |  |
Allowance for Credit Losses |  | (27) | (28) |  | (9) | (9)
Commercial Loans |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Total Loans Receivable | 17,738 |  | 14,355 |  |  |
Allowance for Credit Losses | $ (33) | $ (43) | $ (80) | $ (145) | $ (126) | $ (126)

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