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OTHER COMPREHENSIVE INCOME (LOSS) (Tables)
 9 Months Ended
Jun. 30, 2025
Other Comprehensive Income (Loss) [Abstract]  
Schedule of Components of Other Comprehensive Income (Loss) and the Related Income Tax Effects The components of other comprehensive income (loss) and the related income tax effects are as follows:
   Three Months Ended June 30, 
   2025   2024 
           Net of           Net of 
   Before Tax   Tax   Tax   Before Tax   Tax   Tax 
   Amount   Expense   Amount   Amount   Benefit   Amount 
   (In thousands) 
Unrealized holding gain (loss) arising during period on:                              
Available-for-sale investments  $115   $(28)  $87   $(14)  $4   $(10)
Total unrealized holding gain (loss) arising during period   115    (28)   87    (14)   4    (10)
Other comprehensive income (loss), net  $115   $(28)   87   $(14)  $4    (10)
   Nine Months Ended June 30, 
   2025   2024 
           Net of           Net of 
   Before Tax   Tax   Tax   Before Tax   Tax   Tax 
   Amount   Expense   Amount   Amount   Expense   Amount 
   (In thousands) 
Unrealized holding gain arising during period on:                              
Available-for-sale investments  $141   $(35)  $106   $487   $(120)  $367 
Total unrealized holding gain arising during period   141    (35)   106    487    (120)   367 
Other comprehensive income, net  $141   $(35)   106   $487   $(120)   367