REVENUE RECOGNITION - Narrative (Details) - USD ($)		12 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue recognized included in contract liability balance at the beginning of the period		$ 16,900,000	$ 19,300,000	$ 10,900,000
Unbilled receivables		400,000	900,000
Amortization of costs capitalized to obtain revenue contracts	[1]	1,662,000	1,514,000	1,306,000
Impairment losses recognized in capitalized contract costs		0	0	0
Selling and Marketing
Disaggregation of Revenue [Line Items]
Amortization of costs capitalized to obtain revenue contracts		1,700,000	1,500,000	$ 1,300,000
Other Current and Non-Current Assets
Disaggregation of Revenue [Line Items]
Capitalized contract costs		$ 2,700,000	$ 2,600,000
License
Disaggregation of Revenue [Line Items]
Invoice payment period (no more than)		60 days
Service 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
Revenue, remaining performance obligation, amount period		13 months
Minimum | Software
Disaggregation of Revenue [Line Items]
Estimated useful lives of intangible assets (in years)		1 year
Maximum
Disaggregation of Revenue [Line Items]
Estimated useful lives of intangible assets (in years)		7 years
Revenue, remaining performance obligation, amount period		36 months
Maximum | Software
Disaggregation of Revenue [Line Items]
Estimated useful lives of intangible assets (in years)		3 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, amount period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, amount period

[1] Consolidated statements of cash flows for the twelve months ended September 30, 2023 and September 30, 2022 reflect revisions and reclassifications to conform to the current year presentation.