v3.26.1
LOANS AND ACL - Additional information (Details)
12 Months Ended
Mar. 31, 2026
USD ($)
item
Mar. 31, 2025
USD ($)
item
Mar. 31, 2024
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Deferred loan fees $ 4,300,000 $ 4,300,000  
Discount on Loans receivable 1,000,000 1,200,000  
Premiums on Loans receivable 1,600,000 1,700,000  
Loans pledged as collateral $ 1,077,236,000 $ 1,047,086,000  
Number of Loans to Foreign Domiciled Businesses or Foreign Countries | item 0 0  
Percentage of loans and extensions of credit outstanding 15.00%    
Minimum percentage of monthly payments charged off for consumer installment loan 75.00%    
Financing receivable, excluding accrued interest, modified in period, amount $ 0    
Financing receivable, excluding accrued interest, modified, subsequent default 0    
Interest income foregone on non-accrual loans 240,000 $ 16,000 $ 10,000
Non-accrual loans with no ACL 7,500,000 94,000  
Non-accrual loans with ACL 226,000 61,000  
Non-accruals, Allowance 5,000 1,000  
Total loans 1,092,484,000 1,062,460,000  
30-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans 6,508,000 4,082,000  
Assets pledged as collateral | FHLB and FRB Borrowing Arrangements      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans pledged as collateral 748,400,000    
Assets pledged as collateral | Financing receivable | Commercial Business      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans pledged as collateral 519,000 37,000  
Assets pledged as collateral | Financing receivable | Commercial Real Estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans pledged as collateral 7,000,000 57,000  
Commercial Real Estate Portfolio Segment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans 968,277,000 950,363,000  
Commercial Real Estate Portfolio Segment | Commercial Business      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans 219,846,000 232,935,000  
Commercial Real Estate Portfolio Segment | Commercial Business | 30-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans 2,346,000 3,793,000  
Commercial Real Estate Portfolio Segment | Commercial Real Estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans 611,634,000 592,185,000  
Commercial Real Estate Portfolio Segment | Commercial Real Estate | 30-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans $ 4,118,000 242,000  
Commercial Real Estate Portfolio Segment | Raw land loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Maximum loan-to-value ratio 65.00%    
Commercial Real Estate Portfolio Segment | Improved land loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Maximum loan-to-value ratio 75.00%    
Commercial Real Estate Portfolio Segment | Minimum | Commercial Real Estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Maximum loan-to-value ratio 65.00%    
Commercial Real Estate Portfolio Segment | Maximum | Commercial Real Estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Maximum loan-to-value ratio 80.00%    
Consumer      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans $ 124,207,000 112,097,000  
Consumer | 30-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans $ 44,000 47,000  
Consumer | Real estate one-to-four family      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Maximum loan-to-value ratio 80.00%    
Total loans $ 96,698,000 $ 97,683,000  
Consumer | Minimum | Real estate one-to-four family      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Terms of maturity 15 years    
Consumer | Maximum | Real estate one-to-four family      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Terms of maturity 30 years