v3.26.1
INVESTMENT SECURITIES - Schedule of Mortgage-Backed Securities Available-for-Sale (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Jun. 30, 2026
Sep. 30, 2025
Mortgage-backed securities:    
Fair Value, Mortgage-backed securities $ 98,304 $ 82,342
Total securities available-for-sale, Amortized Cost 38,007 21,915
Total investment securities, Fair Value 37,380 $ 21,182
Mortgage-Backed Securities [Member]    
Schedule of Mortgage-Backed Securities Available-for-Sale [Line Items]    
Amortized Cost, Due within 1 year  
Fair Value, Due within 1 year  
Amortized Cost, Due after 1 but within 5 years  
Fair Value, Due after 1 but within 5 years  
Amortized Cost, Due after 5 but within 10 years 6,500  
Fair Value, Due after 5 but within 10 years 6,888  
Amortized Cost, Due after 10 years  
Fair Value, Due after 10 years  
Amortized Cost, Total debt securities 6,500  
Fair Value, Total debt securities 6,888  
Mortgage-backed securities:    
Amortized Cost, Mortgage-backed securities 31,507  
Fair Value, Mortgage-backed securities 30,492  
Total securities available-for-sale, Amortized Cost 38,007  
Total investment securities, Fair Value 37,380  
Mortgage-Backed Securities [Member] | Residential [Member]    
Mortgage-backed securities:    
Amortized Cost, Mortgage-backed securities 31,507  
Fair Value, Mortgage-backed securities 30,492  
Mortgage-Backed Securities [Member] | Commercial [Member]    
Mortgage-backed securities:    
Amortized Cost, Mortgage-backed securities  
Fair Value, Mortgage-backed securities