Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Financial Assets:
Held-to-maturity, Fair Value	$ 9,917	$ 10,564
Fair Value, Inputs, Level 1
Financial Assets:
Cash and cash equivalents	70,933	47,540
Securities Available-for-Sale	0	0
Held-to-maturity, Fair Value	0	0
Loans Receivable	0	0
Accrued interest receivable	0	0
Mortgage servicing rights	0	0
Other assets - Interest-bearing deposits	0	0
Financial Liabilities:
Deposits	346,300	291,951
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	103,075	65,829
Held-to-maturity, Fair Value	9,917	10,564
Loans Receivable	0	0
Accrued interest receivable	2,565	2,052
Mortgage servicing rights	0	0
Other assets - Interest-bearing deposits	983	981
Financial Liabilities:
Deposits	195,288	197,358
Other borrowed money	41,769	13,386
Accrued interest payable	2,975	2,695
Fair Value, Inputs, Level 3
Financial Assets:
Cash and cash equivalents	0	0
Securities Available-for-Sale	0	0
Held-to-maturity, Fair Value	0	0
Loans Receivable	473,924	438,017
Accrued interest receivable	0	0
Mortgage servicing rights	142	145
Other assets - Interest-bearing deposits	0	0
Financial Liabilities:
Deposits	0	0
Other borrowed money	0	0
Accrued interest payable	0	0
Reported Value Measurement
Financial Assets:
Cash and cash equivalents	70,933	47,540
Securities Available-for-Sale	103,075	65,829
Held-to-maturity, Fair Value	9,501	10,151
Loans Receivable	459,283	423,786
Accrued interest receivable	2,565	2,052
Mortgage servicing rights	142	145
Other assets - Interest-bearing deposits	983	981
Financial Liabilities:
Deposits	540,746	488,815
Other borrowed money	41,696	13,403
Accrued interest payable	2,975	2,695
Estimate of Fair Value Measurement
Financial Assets:
Cash and cash equivalents	70,933	47,540
Securities Available-for-Sale	103,075	65,829
Held-to-maturity, Fair Value	9,917	10,564
Loans Receivable	473,924	438,017
Accrued interest receivable	2,565	2,052
Mortgage servicing rights	142	145
Other assets - Interest-bearing deposits	983	981
Financial Liabilities:
Deposits	541,588	489,309
Other borrowed money	41,769	13,386
Accrued interest payable	$ 2,975	$ 2,695