Investment Securities - Summary of Investment Securities Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Amortized Cost	$ 62,671	$ 63,814
Available for sale, Gross Unrealized Gains	209	31
Available for sale, Gross Unrealized Losses	(5,564)	(6,003)
Available for sale, Fair Value	57,316	57,842
FHLMC Bonds
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Amortized Cost	24,609	25,446
Available for sale, Gross Unrealized Gains	45	13
Available for sale, Gross Unrealized Losses	(1,976)	(2,203)
Available for sale, Fair Value	22,678	23,256
GNMA Bonds
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Amortized Cost	3,595	2,648
Available for sale, Gross Unrealized Gains	1
Available for sale, Gross Unrealized Losses	(45)	(58)
Available for sale, Fair Value	3,551	2,590
FNMA Bonds
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Amortized Cost	25,837	26,726
Available for sale, Gross Unrealized Gains	163	17
Available for sale, Gross Unrealized Losses	(2,205)	(2,453)
Available for sale, Fair Value	23,795	24,290
Municipal Bonds
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Amortized Cost	8,630	8,994
Available for sale, Gross Unrealized Gains		1
Available for sale, Gross Unrealized Losses	(1,338)	(1,289)
Available for sale, Fair Value	$ 7,292	$ 7,706