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Investment Securities - Additional information (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
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Jun. 30, 2025 USD ($) security position | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) security position | Jun. 30, 2024 USD ($) | Dec. 31, 2024 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
INVESTMENT SECURITIES: |  |  |  |  |  |  |  |
Investment trading account | $ 5,000,000 |  | $ 5,000,000 |  |  |  |  |
Cash held in the account available for future security purchases | 896,000 |  | 896,000 |  |  |  |  |
Gross investment losses |  | $ 0 |  | $ 0 |  |  |  |
Gross investment gains |  | 0 |  | 0 |  |  |  |
Accrued interest receivable on held to maturity debt securities | 396,000 |  | 396,000 |  | $ 403,000 |  |  |
Proceeds from sale of investment securities - available for sale | 0 | 500,000 | 0 | 935,000 |  |  |  |
Book value of securities available for sale and held to maturity | 133,908,000 |  | $ 133,908,000 |  | $ 125,849,000 |  |  |
Premium percentage on mortgage backed securities purchased |  |  | 100.70% |  |  |  |  |
The weighted average duration of the total investment securities portfolio |  |  | 47 months 18 days |  | 50 months 9 days |  |  |
Accrued interest receivable on available for sale debt securities | $ 982,000 |  | $ 982,000 |  | $ 833,000 |  |  |
Number of available for sale debt securities in non accrual status | security | 1 |  | 1 |  |  |  |  |
Available-for-Sale debt securities in non-accrual | $ 1,000,000 |  | $ 1,000,000 |  | 1,000,000 |  |  |
Percentage of unrealized loss position for less than 12 months |  |  | 4.40% |  |  |  |  |
Percentage of unrealized loss position for greater than 12 months |  |  | 11.30% |  |  |  |  |
Available for sale securities, allowance for credit losses | 1,000,000 | 360,000 | $ 1,000,000 | 360,000 | 360,000 | $ 1,000,000 | $ 116,000 | $ 926,000
Carrying value of equity securities without readily determinable fair values | 600,000 |  | 600,000 |  | 600,000 |  |  |
Investment securities held to maturity, Allowance for credit losses | (85,000) | (100,000) | (85,000) | (100,000) | (89,000) | (96,000) | (90,000) | (37,000)
Held to maturity debt securities in non-accrual | $ 0 |  | $ 0 |  | 0 |  |  |
U.S. Agency |  |  |  |  |  |  |  |
INVESTMENT SECURITIES: |  |  |  |  |  |  |  |
Unrealized loss position for greater than 12 months, Number of positions | position | 6 |  | 6 |  |  |  |  |
Investment securities held to maturity, Allowance for credit losses | $ 0 |  | $ 0 |  |  |  |  |
U.S. Agency mortgage-backed securities |  |  |  |  |  |  |  |
INVESTMENT SECURITIES: |  |  |  |  |  |  |  |
Unrealized loss position for less than 12 months, Number of positions | position | 7 |  | 7 |  |  |  |  |
Unrealized loss position for greater than 12 months, Number of positions | position | 127 |  | 127 |  |  |  |  |
Investment securities held to maturity, Allowance for credit losses | $ 0 |  | $ 0 |  |  |  |  |
Municipal |  |  |  |  |  |  |  |
INVESTMENT SECURITIES: |  |  |  |  |  |  |  |
Unrealized loss position for greater than 12 months, Number of positions | position | 23 |  | 23 |  |  |  |  |
Investment securities held to maturity, Allowance for credit losses | $ (2,000) | (2,000) | $ (2,000) | (2,000) | (2,000) | (1,000) | (2,000) | (2,000)
Corporate bonds |  |  |  |  |  |  |  |
INVESTMENT SECURITIES: |  |  |  |  |  |  |  |
Unrealized loss position for less than 12 months, Number of positions | position | 8 |  | 8 |  |  |  |  |
Unrealized loss position for greater than 12 months, Number of positions | position | 61 |  | 61 |  |  |  |  |
Available for sale securities, allowance for credit losses | $ 1,000,000 | $ 360,000 | $ 1,000,000 | $ 360,000 | $ 360,000 | $ 1,000,000 | $ 116,000 | $ 926,000
Revolving credit facility |  |  |  |  |  |  |  |
INVESTMENT SECURITIES: |  |  |  |  |  |  |  |
Collateral amount | $ 3,893,000 |  | $ 3,893,000 |  |  |  |  |
Standard & Poor's, AAA Rating |  |  |  |  |  |  |  |
INVESTMENT SECURITIES |  |  |  |  |  |  |  |
Portfolio rated | 0.10% |  | 0.10% |  | 59.20% |  |  |
Standard & Poor's, AA Rating |  |  |  |  |  |  |  |
INVESTMENT SECURITIES |  |  |  |  |  |  |  |
Portfolio rated | 74.20% |  | 74.20% |  | 72.80% |  |  |
Securities rated below A |  |  |  |  |  |  |  |
INVESTMENT SECURITIES |  |  |  |  |  |  |  |
Portfolio rated | 14.10% |  | 14.10% |  | 14.70% |  |  |
Maximum |  |  |  |  |  |  |  |
INVESTMENT SECURITIES: |  |  |  |  |  |  |  |
The weighted average duration of the total investment securities portfolio |  |  | 60 months |  |  |  |  |

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