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Fair Value of Financial Instruments - Summary of Financial Assets Measured at Fair Value on a Recurring Basis are Available-for-Sale Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Mar. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities Available-for-sale $ 59,670 $ 59,369
Municipal Bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities Available-for-sale 7,498 7,246
Fair Value, Recurring | Estimated Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities Available-for-sale 59,670 59,369
Fair Value, Recurring | Estimated Fair Value | Mortgage Backed Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities Available-for-sale 52,172 52,123
Fair Value, Recurring | Estimated Fair Value | Municipal Bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities Available-for-sale 7,498 7,246
Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities Available-for-sale 59,700 59,400
Fair Value, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities Available-for-sale 59,670 59,369
Fair Value, Recurring | Level 2 | Mortgage Backed Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities Available-for-sale 52,172 52,123
Fair Value, Recurring | Level 2 | Municipal Bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities Available-for-sale $ 7,498 $ 7,246