Note 6 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Amortization of Intangible Assets	$ 6.1	$ 7.2	$ 12.2	$ 14.4