BUSINESS COMBINATIONS - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Goodwill	$ 123,548	$ 115,632
ID R&D
Business Acquisition [Line Items]
Accounts receivable	173
Property, plant, and equipment	114
Other current assets	147
Intangible assets	16,930
Goodwill	27,748
Current liabilities	(425)
Deferred revenue	0
Deferred income tax liabilities	(2,355)
Net assets acquired	42,332
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