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OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Components of Other Comprehensive Income (Loss) and the Related Income Tax Effects (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025
Before Tax Amount [Member] |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Available-for-sale investments |  | $ (61) | $ 263 | $ 69 | $ 26
Other comprehensive (loss) income, net |  | (61) | 263 | 69 | 26
Tax Expense [Member] |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Available-for-sale investments | [1] | 15 | (65) | (17) | (6)
Other comprehensive (loss) income, net | [1] | 15 | (65) | (17) | (6)
Net of Tax Amount [Member] |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Available-for-sale investments |  | (46) | 198 | 52 | 20
Other comprehensive (loss) income, net |  | $ (46) | $ 198 | $ 52 | $ 20
[1] | Related income tax expense or benefit calculated using an income tax rate approximating 25% for available-for-sale investments

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