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Investment Securities Text Tags (Details)
 6 Months Ended
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Mar. 31, 2024
USD ($)
Schedule of Investments [Line Items]      
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions 21   24
Debt Securities, Available-for-sale $ 48,111,000   $ 48,030,000
Percentage Available-for-sale Securities 96.30%    
Debt Securities, Held-to-maturity $ 1,863,000   2,008,000
Percentage Held-to-maturity Securities 3.70%    
Trading $ 0   0
Bank Owned Life Insurance 5,400,000    
Other Investments 7,000,000.0    
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 55.60%    
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 6    
Debt Securities, Available-for-sale $ 24,491,000   24,717,000
US Government Agency Securities      
Schedule of Investments [Line Items]      
Percentage Available-for-Sale, Continuos Unrealized Loss Position 3.40%    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions 1    
Debt Securities, Available-for-sale $ 5,754,000   6,194,000
Municipal Securities      
Schedule of Investments [Line Items]      
Percentage Available-for-Sale, Continuos Unrealized Loss Position 33.70%    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions 6    
Debt Securities, Available-for-sale $ 14,686,000   14,056,000
Corporate Bonds      
Schedule of Investments [Line Items]      
Percentage Available-for-Sale, Continuos Unrealized Loss Position 7.30%    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions 1    
Debt Securities, Available-for-sale $ 3,180,000   $ 3,063,000