BUSINESS COMBINATIONS - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022
Business Acquisition [Line Items]
Goodwill	$ 131,535	$ 120,186	$ 127,163
HooYu
Business Acquisition [Line Items]
Accounts receivable	1,234
Property, plant, and equipment	504
Other current assets	630
Intangible assets	73,100
Goodwill	74,206
Current liabilities	(2,264)
Deferred revenue	(2,612)
Deferred income tax liabilities	(16,896)
Net assets acquired	$ 127,902