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Investment Securities Text Tag (Details) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract] |  |
Available-for-sale | $ 48,030,000 | $ 53,843,000
Percentage Available-for-sale Securities | 96.00% |
Debt Securities, Held-to-maturity | $ 2,008,000 | 2,318,000
Percentage Held-to-maturity Securities | 4.00% |
Debt Securities, Trading, and Equity Securities, FV-NI | $ 0 | 0
Bank Owned Life Insurance | 5,300,000 |
Other Investments | 6,900,000 |
Proceeds from sales of investments: Available-for-sale | $ 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 24 |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale | $ 48,030,000 | 53,843,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss | 0 |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss | 0 |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Deposit Liabilities, Collateral Issued, Financial Instruments | 300,000 |
Mortgage-Backed Securities |  |
Investments, Debt and Equity Securities [Abstract] |  |
Available-for-sale | 24,717,000 | 27,443,000
Debt Securities, Held-to-maturity | $ 2,008,000 |
Debt Securities, Available-for-sale [Line Items] |  |
Percentage Available-for-Sale, Continuous Unrealized Loss Position | 51.20% |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 8 |
Available-for-sale | $ 24,717,000 | 27,443,000
US Government Agency Securities |  |
Investments, Debt and Equity Securities [Abstract] |  |
Available-for-sale | $ 6,194,000 | 9,326,000
Debt Securities, Available-for-sale [Line Items] |  |
Percentage Available-for-Sale, Continuous Unrealized Loss Position | 13.00% |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 2 |
Available-for-sale | $ 6,194,000 | 9,326,000
Corporate Bonds |  |
Investments, Debt and Equity Securities [Abstract] |  |
Available-for-sale | $ 3,063,000 | 3,092,000
Debt Securities, Available-for-sale [Line Items] |  |
Percentage Available-for-Sale, Continuous Unrealized Loss Position | 6.40% |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 1 |
Available-for-sale | $ 3,063,000 | 3,092,000
Municipal Bonds |  |
Investments, Debt and Equity Securities [Abstract] |  |
Available-for-sale | $ 14,056,000 | 13,982,000
Debt Securities, Available-for-sale [Line Items] |  |
Percentage Available-for-Sale, Continuous Unrealized Loss Position | 29.40% |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 6 |
Available-for-sale | $ 14,056,000 | $ 13,982,000
Debt Securities |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | $ 2,200,000 |

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
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