Note 2 - Revenue Recognition (Details Textual) - USD ($)	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Oct. 01, 2024	Sep. 30, 2024	Oct. 01, 2023
Contract with Customer, Liability, Current	$ 0			$ 0
Capitalized Contract Cost, Net, Current	0			$ 0
Contract with Customer, Liability, Revenue Recognized, Including Balance	0	$ 45,000
Contract with Customer, Liability, Cost of Revenue Recognized	0	0
Contract with Customer, Receivable, after Allowance for Credit Loss	12,000,000	37,600,000	$ 13,400,000		$ 10,900,000
Transferred over Time [Member]
Contract with Customer, Liability, Revenue Recognized	$ 0	$ 45,000