Investment Securities - Additional information (Details) - USD ($)	Dec. 31, 2024	Mar. 31, 2024
Investment Securities
Available-for-sale securities	$ 23,204,214	$ 25,181,361
U.S. Government agencies
Investment Securities
Available-for-sale securities	2,678,805	2,660,297
Available for sale securities, allowance for credit loss	0
Mortgage-backed Government Sponsored Enterprises (GSEs)
Investment Securities
Available-for-sale securities	9,640,955	10,717,842
Available for sale securities, allowance for credit loss	0
State and political subdivisions
Investment Securities
Available-for-sale securities	10,209,070	10,657,082
Available for sale securities, allowance for credit loss	0
Time deposits
Investment Securities
Available-for-sale securities	675,384	1,146,140
Available for sale securities, allowance for credit loss	0
Assets pledged as collateral
Investment Securities
Available-for-sale securities	$ 6,423,000	$ 1,051,000