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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) | 12 Months Ended
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Sep. 30, 2022 USD ($) year | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($)
Impairment Effects on Earnings Per Share [Line Items] |  |  |
Goodwill additions | $ 0 |  |
Impairments of goodwill | 0 | $ 0 | $ 38,300,000
Goodwill | 45,653,000 | 45,653,000 |
Amortization | 7,200,000 | $ 7,200,000 | $ 7,200,000
Expected amortization in 2023 | 6,600,000 |  |
Expected amortization in 2024 | $ 6,400,000 |  |
Valuation Technique, Discounted Cash Flow | H&P Technologies | Expected cash flow period |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |
Reporting unit, measurement input | year | 5 |  |
Valuation Technique, Discounted Cash Flow | H&P Technologies | Measurement input, discount Rate |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |
Reporting unit, measurement input | 0.14 |  |

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