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Loans Receivable and Allowance for Credit Losses - Loans receivable (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022
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Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Loans Receivable, Net of Unearned Income | $ 368,813 |  | $ 367,050 |  |  |
Allowance for Credit Losses | (1,699) | $ (2,699) | (2,802) | $ (3,253) | $ (3,253) | $ (3,253)
Net Deferred Loan Costs | 793 |  | 790 |  |  |
Loans Receivable, Net | 367,907 |  | 365,038 |  |  |
One-to-Four Family Mortgages |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Loans Receivable, Net of Unearned Income | 334,244 |  | 337,056 |  |  |
Allowance for Credit Losses | (1,273) | (2,454) | (2,554) | (2,738) | (2,738) | (2,738)
Home Equity Loans / Lines of Credit |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Loans Receivable, Net of Unearned Income | 8,203 |  | 8,550 |  |  |
Allowance for Credit Losses | (57) | (54) | (57) | (60) | (60) | (60)
Construction Loans |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Loans Receivable, Net of Unearned Income | 10,268 |  | 8,128 |  |  |
Allowance for Credit Losses | (7) | (32) | (32) | (73) | (73) | (73)
Consumer Loans |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Loans Receivable, Net of Unearned Income | 1,053 |  | 913 |  |  |
Allowance for Credit Losses |  | (9) | (9) |  |  |
Commercial loans |  |  |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |  |  |
Loans Receivable, Net of Unearned Income | 15,045 |  | 12,403 |  |  |
Allowance for Credit Losses | $ (145) | $ (126) | $ (126) | $ (2) | $ (2) | $ (2)

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