GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($)	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Sep. 30, 2025
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 133,399,000		$ 133,457,000
Goodwill impairment	0	$ 0
Amortization of acquired intangible assets	3,286,000	3,657,000
Finite-lived intangible assets, foreign currency translation gain	33,000
Impairment charges related to intangible assets	$ 0	$ 0
Minimum
Goodwill and Intangible Assets [Line Items]
Estimated useful lives of intangible assets (in years)	3 years
Maximum
Goodwill and Intangible Assets [Line Items]
Estimated useful lives of intangible assets (in years)	7 years