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INCOME TAXES - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Income Tax Disclosure [Abstract]      
Gross deferred tax on state net operating loss carryforwards $ 3,600 $ 3,000  
Operating loss carryforwards reserved 3,600 3,000  
Tax credit, investment, amount 19,700 $ 19,700 $ 27,400
Unrecognized tax benefits that, if recognized, would impact the effective rate 499    
Accrued interest related to unrecognized tax benefits $ 57