Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Note 4 - Business Combinations (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Feb. 02, 2023	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Payments to Acquire Businesses, Net of Cash Acquired		$ (0)	$ (0)	$ 386,508
Goodwill		$ 702,395	$ 691,409	$ 675,361
Ziath, Ltd. [Member]
Payments to Acquire Businesses, Net of Cash Acquired	$ 16,000
Goodwill	12,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities	1,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	300
Business Acquisition, Goodwill, Expected Tax Deductible Amount	0
Ziath, Ltd. [Member] \| Developed Technology Rights [Member]
Payments to Acquire Businesses, Net of Cash Acquired	$ 4,100
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)	10 years
Ziath, Ltd. [Member] \| Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 600
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)	13 years
Ziath, Ltd. [Member] \| Trademarks [Member]
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)	13 years