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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Other Items Allocated to Comprehensive Income/Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021
Unrealized holding gain (loss) arising during period on: |  |
Available-for-sale investments before tax | $ (1,744) | $ (293)
Tax (benefit) expense | 429 | 79
Available-for-sale investments after tax | (1,315) | (214)
Defined benefit pension plan before tax | 211 | 893
Tax (benefit) expense | (64) | (269)
Defined benefit pension plan after tax | 148 | 624
Other comprehensive income (loss), net before tax | (1,533) | 600
Tax (benefit) expense, Total | 365 | (190)
Other comprehensive income (loss), net | $ (1,167) | $ 410

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