REVENUE CONCENTRATION - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Concentration Risk [Line Items]
Revenue	$ 172,083	$ 172,552	$ 144,804
Accounts receivable, net	31,682	32,132	35,922
All other countries
Concentration Risk [Line Items]
Revenue	19,132	37,595	31,305
Revenue \| Customer Concentration Risk
Concentration Risk [Line Items]
Revenue	$ 29,600	$ 27,700	$ 25,000
Revenue \| Customer Concentration Risk \| Customer One
Concentration Risk [Line Items]
Concentration risk (as a percent)	17.00%	16.00%	17.00%
Accounts Receivable \| Customer Concentration Risk
Concentration Risk [Line Items]
Accounts receivable, net	$ 5,500	$ 2,700	$ 8,000
Long-Term Assets \| Geographic Concentration Risk \| All other countries
Concentration Risk [Line Items]
Concentration risk (as a percent)	78.00%	76.00%
Long-Term Assets, Excluding Goodwill and Intangible Assets \| Geographic Concentration Risk \| All other countries
Concentration Risk [Line Items]
Concentration risk (as a percent)	19.00%	23.00%

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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