Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	$ 9,501	$ 10,151
Held-to-maturity, Gross Unrealized Gains	425	418
Held-to-maturity, Gross Unrealized Losses	9	5
Held-to-maturity, Fair Value	9,917	10,564
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	103,054	64,897
Available-for-sale, Gross Unrealized Gains	349	1,115
Available-for-sale, Gross Unrealized Losses	328	183
Available-for-sale, Fair Value	103,075	65,829
Government National Mortgage Association (GNMA)
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	815	972
Held-to-maturity, Gross Unrealized Gains	71	76
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	886	1,048
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	1,628	3,510
Available-for-sale, Gross Unrealized Gains	62	77
Available-for-sale, Gross Unrealized Losses	0	0
Available-for-sale, Fair Value	1,690	3,587
Federal Home Loan Mortgage Corporation (FHLMC)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	30,136	9,244
Available-for-sale, Gross Unrealized Gains	116	312
Available-for-sale, Gross Unrealized Losses	1	18
Available-for-sale, Fair Value	30,251	9,538
Federal National Mortgage Association (FNMA)
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	7,686	8,179
Held-to-maturity, Gross Unrealized Gains	354	342
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	8,040	8,521
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	15,603	21,495
Available-for-sale, Gross Unrealized Gains	0	673
Available-for-sale, Gross Unrealized Losses	0	0
Available-for-sale, Fair Value	15,603	22,168
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	8,501	9,151
Held-to-maturity, Gross Unrealized Gains	425	418
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	8,926	9,569
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	47,367	34,249
Available-for-sale, Gross Unrealized Gains	178	1,062
Available-for-sale, Gross Unrealized Losses	1	18
Available-for-sale, Fair Value	47,544	35,293
US Government Agency Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	20,473	26,616
Available-for-sale, Gross Unrealized Gains	0	20
Available-for-sale, Gross Unrealized Losses	164	155
Available-for-sale, Fair Value	20,309	26,481
Corporate Bonds
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	1,000	1,000
Held-to-maturity, Gross Unrealized Gains	0	0
Held-to-maturity, Gross Unrealized Losses	9	5
Held-to-maturity, Fair Value	991	995
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	6,276	4,032
Available-for-sale, Gross Unrealized Gains	1	33
Available-for-sale, Gross Unrealized Losses	59	10
Available-for-sale, Fair Value	6,218	$ 4,055
Municipal Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	17,773
Available-for-sale, Gross Unrealized Gains	14
Available-for-sale, Gross Unrealized Losses	53
Available-for-sale, Fair Value	17,734
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	11,165
Available-for-sale, Gross Unrealized Gains	156
Available-for-sale, Gross Unrealized Losses	51
Available-for-sale, Fair Value	$ 11,270

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