Disclosures about Fair Value of Assets and Liabilities - Fair Value Hierarchy, Recurring (Details) - USD ($)	Sep. 30, 2025	Mar. 31, 2025
Fair value measurements of assets and liabilities
Available-for-sale securities	$ 23,009,150	$ 23,143,192
U.S. Government agencies
Fair value measurements of assets and liabilities
Available-for-sale securities	2,820,291	2,753,912
Mortgage-backed Government Sponsored Enterprises (GSEs)
Fair value measurements of assets and liabilities
Available-for-sale securities	9,025,913	9,511,736
State and political subdivisions
Fair value measurements of assets and liabilities
Available-for-sale securities	10,467,692	10,199,529
Time deposits
Fair value measurements of assets and liabilities
Available-for-sale securities	695,254	678,015
Recurring
Fair value measurements of assets and liabilities
Liabilities measured at fair value	0
Recurring \| U.S. Government agencies
Fair value measurements of assets and liabilities
Available-for-sale securities	2,820,291	2,753,912
Recurring \| Mortgage-backed Government Sponsored Enterprises (GSEs)
Fair value measurements of assets and liabilities
Available-for-sale securities	9,025,913	9,511,736
Recurring \| State and political subdivisions
Fair value measurements of assets and liabilities
Available-for-sale securities	10,467,692	10,199,529
Recurring \| Time deposits
Fair value measurements of assets and liabilities
Available-for-sale securities	695,254	678,015
Recurring \| Significant Other Observable Inputs (Level 2) \| U.S. Government agencies
Fair value measurements of assets and liabilities
Available-for-sale securities	2,820,291	2,753,912
Recurring \| Significant Other Observable Inputs (Level 2) \| Mortgage-backed Government Sponsored Enterprises (GSEs)
Fair value measurements of assets and liabilities
Available-for-sale securities	9,025,913	9,511,736
Recurring \| Significant Other Observable Inputs (Level 2) \| State and political subdivisions
Fair value measurements of assets and liabilities
Available-for-sale securities	10,467,692	10,199,529
Recurring \| Significant Other Observable Inputs (Level 2) \| Time deposits
Fair value measurements of assets and liabilities
Available-for-sale securities	695,254	$ 678,015
Recurring \| Significant Unobservable Inputs (Level 3)
Fair value measurements of assets and liabilities
Available-for-sale securities	$ 0

Monroe Federal Bancorp, Inc. 10-Q