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REVENUE RECOGNITION - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Sep. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue recognized included in contract liability balance at the beginning of the period | $ 3,600,000 | $ 2,600,000 | $ 19,900,000 | $ 16,300,000 |
Unbilled receivables | 1,900,000 |  | 1,900,000 |  | $ 400,000
Allowance for credit losses | 2,500,000 |  | 2,500,000 |  | 2,100,000
Amortization of costs capitalized to obtain revenue contracts |  |  | 1,394,000 | 1,247,000 |
Impairment losses recognized on contract costs |  |  | 0 | 0 |
Selling and marketing |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Amortization of costs capitalized to obtain revenue contracts | 500,000 | $ 500,000 | 1,400,000 | $ 1,200,000 |
Other Current and Non-current Assets |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Contract costs | $ 3,300,000 |  | $ 3,300,000 |  | $ 2,700,000
Software and hardware |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Invoice payment period (no more than) |  |  | 60 days |  |
Services and other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Invoice payment period (no more than) |  |  | 60 days |  |
Minimum |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Estimated useful lives of intangible assets (in years) | 3 years |  | 3 years |  |
Revenue, remaining performance obligation, amount period | 13 months |  | 13 months |  |
Minimum | Software |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Estimated useful lives of intangible assets (in years) | 1 year |  | 1 year |  |
Maximum |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Estimated useful lives of intangible assets (in years) | 7 years |  | 7 years |  |
Revenue, remaining performance obligation, amount period | 36 months |  | 36 months |  |
Maximum | Software |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Estimated useful lives of intangible assets (in years) | 3 years |  | 3 years |  |

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