Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	$ 10,447	$ 11,137
Held-to-maturity, Gross Unrealized Gains	163	57
Held-to-maturity, Gross Unrealized Losses	6	87
Held-to-maturity, Fair Value	10,604	11,107
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	70,464	80,784
Available-for-sale, Gross Unrealized Gains	476	225
Available-for-sale, Gross Unrealized Losses	497	1,164
Available-for-sale, Fair Value	70,443	79,845
Government National Mortgage Association (GNMA)
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	1,044	1,214
Held-to-maturity, Gross Unrealized Gains	66	40
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	1,110	1,254
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	3,717	4,443
Available-for-sale, Gross Unrealized Gains	23	25
Available-for-sale, Gross Unrealized Losses	21	86
Available-for-sale, Fair Value	3,719	4,382
Federal Home Loan Mortgage Corporation (FHLMC)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	9,824	11,104
Available-for-sale, Gross Unrealized Gains	116	69
Available-for-sale, Gross Unrealized Losses	14	148
Available-for-sale, Fair Value	9,926	11,025
Federal National Mortgage Association (FNMA)
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	8,403	8,923
Held-to-maturity, Gross Unrealized Gains	90	0
Held-to-maturity, Gross Unrealized Losses	6	87
Held-to-maturity, Fair Value	8,487	8,836
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	24,265	27,094
Available-for-sale, Gross Unrealized Gains	287	131
Available-for-sale, Gross Unrealized Losses	235	617
Available-for-sale, Fair Value	24,317	26,608
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	9,447	10,137
Held-to-maturity, Gross Unrealized Gains	156	40
Held-to-maturity, Gross Unrealized Losses	6	87
Held-to-maturity, Fair Value	9,597	10,090
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	37,806	42,641
Available-for-sale, Gross Unrealized Gains	426	225
Available-for-sale, Gross Unrealized Losses	270	851
Available-for-sale, Fair Value	37,962	42,015
US Government Agency Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	28,621	33,089
Available-for-sale, Gross Unrealized Gains	0	0
Available-for-sale, Gross Unrealized Losses	225	236
Available-for-sale, Fair Value	28,396	32,853
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	7	17
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	1,007	1,017
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	4,037	5,054
Available-for-sale, Gross Unrealized Gains	50	0
Available-for-sale, Gross Unrealized Losses	2	77
Available-for-sale, Fair Value	$ 4,085	$ 4,977

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