Note 10 - Revenue From Contracts with Customers (Details Textual) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Sep. 30, 2024
Accounts Receivable, after Allowance for Credit Loss, Current	$ 149,490		$ 156,273
Contract with Customer, Asset, after Allowance for Credit Loss, Current	31,000		28,900
Contract with Customer, Asset, Revenue Recognized	29,200	$ 24,800
Contract with Customer, Liability	41,600		$ 30,500
Contract with Customer, Liability, Revenue Recognized	14,600	$ 19,700
Revenue, Remaining Performance Obligation, Amount	$ 83,806