Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020
Financial Assets:
Held-to-maturity, Fair Value	$ 10,304	$ 10,564
Fair Value, Inputs, Level 1
Financial Assets:
Cash and cash equivalents	113,695	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	340,791	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	63,512	65,829
Held-to-maturity, Fair Value	10,304	10,564
Loans Receivable	0	0
Accrued interest receivable	2,387	2,052
Mortgage servicing rights	0	0
Other assets - Interest-bearing deposits	982	981
Financial Liabilities:
Deposits	200,297	197,358
Other borrowed money	41,769	13,386
Accrued interest payable	2,770	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	468,148	438,017
Accrued interest receivable	0	0
Mortgage servicing rights	152	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	113,695	47,540
Securities Available-for-Sale	63,512	65,829
Held-to-maturity, Fair Value	9,875	10,151
Loans Receivable	453,735	423,786
Accrued interest receivable	2,387	2,052
Mortgage servicing rights	152	145
Other assets - Interest-bearing deposits	982	981
Financial Liabilities:
Deposits	539,587	488,815
Other borrowed money	41,696	13,403
Accrued interest payable	2,770	2,695
Estimate of Fair Value Measurement
Financial Assets:
Cash and cash equivalents	113,695	47,540
Securities Available-for-Sale	63,512	65,829
Held-to-maturity, Fair Value	10,304	10,564
Loans Receivable	468,148	438,017
Accrued interest receivable	2,387	2,052
Mortgage servicing rights	152	145
Other assets - Interest-bearing deposits	982	981
Financial Liabilities:
Deposits	541,088	489,309
Other borrowed money	41,769	13,386
Accrued interest payable	$ 2,770	$ 2,695