BUSINESS COMBINATIONS - Intangible Assets Acquired (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization Period	4 years 8 months 12 days	4 years 8 months 12 days
Covenants not to compete
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization Period	3 years	3 years
ID R&D
Acquired Indefinite-lived Intangible Assets [Line Items]
Amount assigned	$ 16,930
ID R&D | Completed technologies
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization Period	7 years
Amount assigned	$ 14,020
ID R&D | Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization Period	3 years
Amount assigned	$ 2,540
ID R&D | Trade name
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization Period	5 years
Amount assigned	$ 370
HooYu
Acquired Indefinite-lived Intangible Assets [Line Items]
Amount assigned	$ 73,100
HooYu | Completed technologies
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization Period	7 years
Amount assigned	$ 61,400
HooYu | Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization Period	5 years
Amount assigned	$ 5,000
HooYu | Trade name
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization Period	5 years
Amount assigned	$ 6,100
HooYu | Covenants not to compete
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization Period	3 years
Amount assigned	$ 600