Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022
Financial Assets
Securities held-to-maturity	$ 2,221	$ 5,276
Fair Value, Inputs, Level 1
Financial Assets
Cash and cash equivalents	42,552	61,018
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Loans receivable	0	0
Accrued interest receivable	0	0
Mortgage servicing rights	0	0
Financial Liabilities
Deposits	418,432	485,884
Advances from FHLB of New York	0
Other borrowed money	0	0
Accrued interest payable	0	0
Fair Value, Inputs, Level 2
Financial Assets
Cash and cash equivalents	0	0
Securities available-for-sale	53,843	67,596
Securities held-to-maturity	2,221	5,276
Loans receivable	0	0
Accrued interest receivable	1,911	2,414
Mortgage servicing rights	0	0
Financial Liabilities
Deposits	176,304	138,276
Advances from FHLB of New York	35,238
Other borrowed money	14,575	15,673
Accrued interest payable	380	91
Fair Value, Inputs, Level 3
Financial Assets
Cash and cash equivalents	0	0
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Loans receivable	567,029	563,821
Accrued interest receivable	0	0
Mortgage servicing rights	152	162
Financial Liabilities
Deposits	0	0
Advances from FHLB of New York	0
Other borrowed money	0	0
Accrued interest payable	0	0
Reported Value Measurement
Financial Assets
Cash and cash equivalents	42,552	61,018
Securities available-for-sale	53,843	67,596
Securities held-to-maturity	2,318	5,254
Loans receivable	592,667	573,880
Accrued interest receivable	1,911	2,414
Mortgage servicing rights	152	162
Financial Liabilities
Deposits	600,429	628,117
Advances from FHLB of New York	35,000
Other borrowed money	15,903	15,906
Accrued interest payable	380	91
Estimate of Fair Value Measurement
Financial Assets
Cash and cash equivalents	42,552	61,018
Securities available-for-sale	53,843	67,596
Securities held-to-maturity	2,221	5,276
Loans receivable	567,029	563,821
Accrued interest receivable	1,911	2,414
Mortgage servicing rights	152	162
Financial Liabilities
Deposits	594,736	624,160
Advances from FHLB of New York	35,238
Other borrowed money	14,575	15,673
Accrued interest payable	$ 380	$ 91