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Investment Securities - Schedule of Amortized Cost and Fair Value of Available for sale Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Investment Securities Available-for-sale Amortized cost
Due after one year through five years	$ 3,012
Due after five years through ten years	2,602
Due after ten years	3,007
Mortgage-backed securities and collateralized mortgage obligations	54,580
Available for sale, Amortized Cost	63,201	$ 63,979
Investment Securities Available-for-sale, Estimated Fair Value
Due after one year through five years	2,932
Due after five years through ten years	2,195
Due after ten years	2,371
Mortgage-backed securities and collateralized mortgage obligations	52,172
Total	$ 59,670	$ 59,369

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