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STOCK AWARD PLANS - Other Stock Option Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Share-Based Payment Arrangement [Abstract] |  |  |
Compensation cost for stock options | $ 1,147 | $ 1,571 | $ 1,875
Weighted average grant date fair value per stock option (in dollars per share) | $ 6.69 | $ 6.14 | $ 5.91
Total intrinsic value of options exercised | $ 718 | $ 1,228 | $ 214
Grant date fair value of options exercised | 648 | 690 | 198
Cash received from option exercises | $ 3,943 | $ 5,187 | $ 1,089

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