Fair Value Of Financial Instruments - Summary Of Carrying Amounts And Estimated Fair Values By Fair Value Hierarchy Of Certain Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Carrying Amount
Financial assets:
Loans, net	$ 370,205	$ 348,337
Financial liabilities:
Interest-bearing deposits	285,068	317,704
Estimated Fair Value
Financial assets:
Loans, net	335,909	316,169
Financial liabilities:
Interest-bearing deposits	259,477	272,270
Level 2
Financial liabilities:
Interest-bearing deposits	259,477	272,270
Level 3
Financial assets:
Loans, net	$ 335,909	$ 316,169