NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration Of customer Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2024	Sep. 30, 2023
Revenue, Major Customer [Line Items]
Revenue	$ 45,729		$ 44,976	$ 134,912	$ 128,861
Accounts receivable, net	40,207		41,609	40,207	41,609	$ 31,682	$ 32,132
Customer Concentration Risk | Sales Revenue Net
Revenue, Major Customer [Line Items]
Revenue	6,100		6,700	22,600	22,600
Customer Concentration Risk | Accounts Receivable
Revenue, Major Customer [Line Items]
Accounts receivable, net	$ 5,700		$ 10,800	$ 5,700	$ 10,800
Customer Concentration Risk | Customer One | Sales Revenue Net
Revenue, Major Customer [Line Items]
Total revenue, percentage	13.00%		15.00%	17.00%	18.00%
Geographic Concentration Risk | Long-term Assets | International
Revenue, Major Customer [Line Items]
Total revenue, percentage		78.00%		79.00%
Geographic Concentration Risk | Long-term Assets, Excluding Goodwill and Other Intangibles | International
Revenue, Major Customer [Line Items]
Total revenue, percentage		19.00%		15.00%