REVENUE RECOGNITION - Schedule of Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Revenue, Major Customer [Line Items]
Revenue	$ 179,691	$ 172,083	$ 172,552
United States
Revenue, Major Customer [Line Items]
Revenue	136,198	135,344	134,957
United Kingdom
Revenue, Major Customer [Line Items]
Revenue	21,476	17,607
All other countries
Revenue, Major Customer [Line Items]
Revenue	$ 22,017	$ 19,132	$ 37,595