Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	$ 81,537	$ 89,682
Available-for-sale, Gross Unrealized Gains	150	155
Available-for-sale, Gross Unrealized Losses	1,834	3,330
Available-for-sale	79,853	86,507
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	5,623	7,807
Held-to-maturity, Gross Unrealized Gains	242	333
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	5,865	8,140
Government National Mortgage Association (GNMA)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	638	987
Available-for-sale, Gross Unrealized Gains	28	39
Available-for-sale, Gross Unrealized Losses	0	0
Available-for-sale	666	1,026
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	574	683
Held-to-maturity, Gross Unrealized Gains	58	69
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	632	752
Federal Home Loan Mortgage Corporation (FHLMC)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	25,980	28,458
Available-for-sale, Gross Unrealized Gains	46	88
Available-for-sale, Gross Unrealized Losses	631	761
Available-for-sale	25,395	27,785
Federal National Mortgage Association (FNMA)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	14,019	15,120
Available-for-sale, Gross Unrealized Gains	0	0
Available-for-sale, Gross Unrealized Losses	436	510
Available-for-sale	13,583	14,610
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Total	5,049	7,124
Held-to-maturity, Gross Unrealized Gains	184	264
Held-to-maturity, Gross Unrealized Losses	0	0
Held-to-maturity, Fair Value	5,233	7,388
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	40,637	44,565
Available-for-sale, Gross Unrealized Gains	74	127
Available-for-sale, Gross Unrealized Losses	1,067	1,271
Available-for-sale	39,644	43,421
US Government Agency Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	17,465	18,744
Available-for-sale, Gross Unrealized Gains	0	0
Available-for-sale, Gross Unrealized Losses	61	113
Available-for-sale	17,404	18,631
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	5,273	5,274
Available-for-sale, Gross Unrealized Gains	0	0
Available-for-sale, Gross Unrealized Losses	338	793
Available-for-sale	4,935	4,481
Municipal Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	17,752	17,763
Available-for-sale, Gross Unrealized Gains	73	0
Available-for-sale, Gross Unrealized Losses	368	1,153
Available-for-sale	17,457	16,610
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Amortized Cost	410	3,336
Available-for-sale, Gross Unrealized Gains	3	28
Available-for-sale, Gross Unrealized Losses	0	0
Available-for-sale	$ 413	$ 3,364

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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