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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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