Investment Securities - Summary of Investment Securities Held to Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Mar. 31, 2024
Schedule of Held-to-Maturity Securities [Line Items]
Held to maturity, Amortized Cost	$ 256	$ 307
Held to maturity, Gross Unrealized Gains	4
Held to maturity, Gross Unrealized Losses		(2)
Held to maturity, Fair Value	260	305
FHLMC Bonds
Schedule of Held-to-Maturity Securities [Line Items]
Held to maturity, Amortized Cost	74	85
Held to maturity, Gross Unrealized Gains	2
Held to maturity, Fair Value	76	85
GNMA Bonds
Schedule of Held-to-Maturity Securities [Line Items]
Held to maturity, Amortized Cost	49	57
Held to maturity, Gross Unrealized Losses		(1)
Held to maturity, Fair Value	49	56
FNMA Bonds
Schedule of Held-to-Maturity Securities [Line Items]
Held to maturity, Amortized Cost	133	165
Held to maturity, Gross Unrealized Gains	2
Held to maturity, Gross Unrealized Losses		(1)
Held to maturity, Fair Value	$ 135	$ 164