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INVESTMENT SECURITIES (Tables)
 9 Months Ended
Jun. 30, 2025
Investment Securities [Abstract]  
Schedule of Amortized Cost and Fair Values of Investment Securities

The following table summarizes the amortized cost and fair values of securities classified as available-for-sale and held-to-maturity at June 30, 2025:

   June 30, 2025 
       Gross   Gross   Allowance for     
   Amortized   Unrealized   Unrealized   Credit   Fair 
   Cost   Gains   Losses   Losses   Value 
   (In thousands) 
Securities available-for-sale:                         
Obligations of U.S. government agencies:                         
Mortgage backed securities - residential  $91   $
—
   $(9)  $
—
   $82 
Obligations of U.S. government-sponsored enterprises:                         
Mortgage-backed securities-residential   16,003    62    (1,189)   
—
    14,876 
Corporate securities   6,500    146    
—
    
—
    6,646 
Total securities available-for-sale  $22,594   $208   $(1,198)  $
—
   $21,604 
Securities held-to-maturity:                         
Obligations of U.S. government agencies:                         
Mortgage-backed securities - residential  $6,781   $
—
   $(687)  $
—
   $6,094 
Mortgage-backed securities - commercial   4,024    19    (7)   
—
    4,036 
Obligations of U.S. government-sponsored enterprises:                         
Mortgage backed securities - residential   41,601    1    (5,219)   
—
    36,383 
Debt securities   10,500    
—
    (560)   
—
    9,940 
Private label mortgage-backed securities - residential   179    
—
    (3)   
—
    176 
Obligations of state and political subdivisions   3,435    1    (368)   
—
    3,068 
Corporate securities   3,000    
—
    (106)   
—
    2,894 
Total securities held-to-maturity  $69,520   $21   $(6,950)  $
—
   $62,591 
Total investment securities  $92,114   $229   $(8,148)  $
—
   $84,195 

 

The following table summarizes the amortized cost and fair values of securities classified as available-for-sale and held-to-maturity at September 30, 2024:

 

   September 30, 2024 
       Gross   Gross   Allowance for     
   Amortized   Unrealized   Unrealized   Credit   Fair 
   Cost   Gains   Losses   Losses   Value 
   (In thousands) 
Securities available-for-sale:                         
Obligations of U.S. government agencies:                         
Mortgage backed securities - residential  $95   $
—
   $(6)  $
—
   $89 
Obligations of U.S. government-sponsored enterprises:                         
Mortgage-backed securities-residential   12,652    56    (1,202)   
—
    11,506 
Corporate securities   4,000    21    
—
    
—
    4,021 
Total securities available-for-sale  $16,747   $77   $(1,208)  $
—
   $15,616 
Securities held-to-maturity:                         
Obligations of U.S. government agencies:                         
Mortgage-backed securities - residential  $7,209   $
—
   $(611)  $
—
   $6,598 
Mortgage-backed securities - commercial   4,268    64    (23)   
—
    4,309 
Obligations of U.S. government-sponsored enterprises:                         
Mortgage backed securities - residential   42,701    4    (5,194)   
—
    37,511 
Debt securities   19,000    13    (865)   
—
    18,148 
Private label mortgage-backed securities - residential   190    
—
    (5)   
—
    185 
Obligations of state and political subdivisions   3,448    3    (351)   
—
    3,100 
Corporate securities   3,000    
—
    (234)   
—
    2,766 
Total securities held-to-maturity  $79,816   $84   $(7,283)  $
—
   $72,617 
Total investment securities  $96,563   $161   $(8,491)  $
—
   $88,233 
The following tables summarize the amortized cost of held-to-maturity debt securities at June 30, 2025 and September 30, 2024, aggregated by credit quality indicator:
   Credit Rating at Amortized Cost 
   AAA/AA/A   BBB/BB/B   Non-rated 
June 30, 2025  (In thousands) 
Securities held-to-maturity:               
Obligations of U.S. government agencies:               
Mortgage-backed securities - residential  $6,781   $
—
   $
—
 
Mortgage-backed securities - commercial   4,024    
—
    
—
 
Obligations of U.S. government-sponsored enterprises:               
Mortgage backed securities - residential   41,601    
—
    
—
 
Debt securities   10,500    
—
    
—
 
Private label mortgage-backed securities - residential   179    
—
    
—
 
Obligations of state and political subdivisions   3,435    
—
    
—
 
Corporate securities   3,000    
—
    
—
 
Total securities held-to-maturity:  $69,520   $
—
   $
—
 

  

   Credit Rating at Amortized Cost 
   AAA/AA/A   BBB/BB/B   Non-rated 
   (In thousands) 
September 30, 2024        
Securities held-to-maturity:               
Obligations of U.S. government agencies:               
Mortgage-backed securities - residential  $7,209   $
—
   $
—
 
Mortgage-backed securities - commercial   4,268    
—
    
—
 
Obligations of U.S. government-sponsored enterprises:               
Mortgage backed securities - residential   42,701    
—
    
—
 
Debt securities   19,000    
—
    
—
 
Private label mortgage-backed securities - residential   190    
—
    
—
 
Obligations of state and political subdivisions   3,448    
—
    
—
 
Corporate securities   3,000    
—
    
—
 
Total securities held-to-maturity:  $79,816   $
—
   $
—
 
Schedule of Maturities Debt Securities and Mortgage-Backed Securities Available-for-Sale

The contractual maturities of debt securities, municipal bonds and certain information regarding mortgage-backed securities available-for-sale at June 30, 2025 are summarized in the following table:

   June 30, 2025 
   Amortized   Fair 
   Cost   Value 
Securities available-for-sale  (In thousands) 
Debt securities:          
Due within 1 year  $
—
   $
—
 
Due after 1 but within 5 years   
—
    
—
 
Due after 5 but within 10 years   6,500    6,646 
Due after 10 years   
—
    
—
 
Total debt securities   6,500    6,646 
           
Mortgage-backed securities:          
Residential   16,094    14,958 
Commercial   
—
    
—
 
Total mortgage-backed securities   16,094    14,958 
 Total securities available-for-sale  $22,594   $21,604 
Schedule of Maturities Debt Securities and Mortgage-Backed Securities Held-to-Maturity

The contractual maturities of debt securities, municipal bonds and certain information regarding mortgage-backed securities held-to-maturity at June 30, 2025 are summarized in the following table:

 

   June 30, 2025 
   Amortized   Fair 
   Cost   Value 
Securities held-to-maturity  (In thousands) 
Debt securities:          
Due within 1 year  $3,000   $2,994 
Due after 1 but within 5 years   12,474    11,683 
Due after 5 but within 10 years   1,461    1,225 
Due after 10 years   
—
    
—
 
Total debt securities   16,935    15,902 
           
Mortgage backed securities:          
Residential   48,561    42,653 
Commercial   4,024    4,036 
Total mortgage-backed securities   52,585    46,689 
 Total securities held-to-maturity  $69,520   $62,591