Note 6 - Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Intangibles assets, cost	$ 510,982	$ 515,636
Intangibles assets, accumulated amortization	257,507	221,335
Intangibles assets, net	253,475	294,301
Patents [Member]
Intangibles assets, cost	1,226	1,226
Intangibles assets, accumulated amortization	1,190	1,175
Intangibles assets, net	36	51
Developed Technology Rights [Member]
Intangibles assets, cost	217,691	215,430
Intangibles assets, accumulated amortization	74,588	56,021
Intangibles assets, net	143,103	159,409
Trademarks and Trade Names [Member]
Intangibles assets, cost	6,721	6,630
Intangibles assets, accumulated amortization	2,624	1,445
Intangibles assets, net	4,097	5,185
Noncompete Agreements [Member]
Intangibles assets, cost	0	681
Intangibles assets, accumulated amortization	0	568
Intangibles assets, net	0	113
Customer Relationships [Member]
Intangibles assets, cost	284,688	290,800
Intangibles assets, accumulated amortization	178,449	161,257
Intangibles assets, net	106,239	129,543
Other Intangible Assets [Member]
Intangibles assets, cost	656	869
Intangibles assets, accumulated amortization	656	869
Intangibles assets, net	$ 0	$ 0