Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	$ 9,164	$ 10,151
Held-to-maturity, Gross Unrealized Gains	387	418
Held-to-maturity, Gross Unrealized Losses	0	5
Held-to-maturity, Fair Value	9,551	10,564
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	99,814	64,897
Available-for-sale, Gross Unrealized Gains	725	1,115
Available-for-sale, Gross Unrealized Losses	358	183
Available-for-sale, Fair Value	100,181	65,829
Government National Mortgage Association (GNMA)
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	736	972
Held-to-maturity, Gross Unrealized Gains	69	76
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	805	1,048
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	1,223	3,510
Available-for-sale, Gross Unrealized Gains	47	77
Available-for-sale, Gross Unrealized Losses	0	0
Available-for-sale, Fair Value	1,270	3,587
Federal Home Loan Mortgage Corporation (FHLMC)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	29,259	9,244
Available-for-sale, Gross Unrealized Gains	93	312
Available-for-sale, Gross Unrealized Losses	183	18
Available-for-sale, Fair Value	29,169	9,538
Federal National Mortgage Association (FNMA)
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	7,428	8,179
Held-to-maturity, Gross Unrealized Gains	318	342
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	7,746	8,521
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	15,379	21,495
Available-for-sale, Gross Unrealized Gains	1	673
Available-for-sale, Gross Unrealized Losses	0	0
Available-for-sale, Fair Value	15,380	22,168
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	8,164	9,151
Held-to-maturity, Gross Unrealized Gains	387	418
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	8,551	9,569
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	45,861	34,249
Available-for-sale, Gross Unrealized Gains	141	1,062
Available-for-sale, Gross Unrealized Losses	183	18
Available-for-sale, Fair Value	45,819	35,293
US Government Agency Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	19,816	26,616
Available-for-sale, Gross Unrealized Gains	0	20
Available-for-sale, Gross Unrealized Losses	138	155
Available-for-sale, Fair Value	19,678	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	0	5
Held-to-maturity, Fair Value	1,000	995
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	5,275	4,032
Available-for-sale, Gross Unrealized Gains	78	33
Available-for-sale, Gross Unrealized Losses	0	10
Available-for-sale, Fair Value	5,353	$ 4,055
Municipal Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	17,769
Available-for-sale, Gross Unrealized Gains	119
Available-for-sale, Gross Unrealized Losses	11
Available-for-sale, Fair Value	17,877
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	11,093
Available-for-sale, Gross Unrealized Gains	387
Available-for-sale, Gross Unrealized Losses	26
Available-for-sale, Fair Value	$ 11,454

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