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Investment Securities Text Tags (Details)
 6 Months Ended
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Mar. 31, 2025
USD ($)
Schedule of Investments [Line Items]      
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions 21   22
Debt Securities, Available-for-sale $ 44,069,000   $ 44,522,000
Percentage Available-for-sale Securities 96.40%    
Debt Securities, Held-to-maturity $ 1,650,000   1,750,000
Percentage Held-to-maturity Securities 3.60%    
Trading $ 0   0
Bank Owned Life Insurance 5,100,000    
Other Investments 6,900,000    
Proceeds from Sale of Debt Securities, Available-for-sale 0 $ 0  
Proceeds from Sale of Held-to-Maturity Securities 0 $ 0  
Debt Securities, Available-for-Sale, Allowance for Credit Loss 0    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss $ 0    
Mortgage-backed securities      
Schedule of Investments [Line Items]      
Percentage Available-for-Sale, Continuos Unrealized Loss Position 52.40%    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions 7    
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 5    
Debt Securities, Available-for-sale $ 22,570,000   23,072,000
US Government Agency Securities      
Schedule of Investments [Line Items]      
Percentage Available-for-Sale, Continuos Unrealized Loss Position 6.50%    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions 1    
Debt Securities, Available-for-sale $ 3,932,000   4,310,000
Municipal Securities      
Schedule of Investments [Line Items]      
Percentage Available-for-Sale, Continuos Unrealized Loss Position 34.40%    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions 6    
Debt Securities, Available-for-sale $ 14,682,000   14,320,000
Corporate Bonds      
Schedule of Investments [Line Items]      
Percentage Available-for-Sale, Continuos Unrealized Loss Position 6.80%    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions 1    
Debt Securities, Available-for-sale $ 2,885,000   $ 2,820,000