Note 2 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Oct. 01, 2022
Contract with Customer, Liability, Current	$ 700	$ 0	$ 700	$ 0
Capitalized Contract Cost, Net, Current	0	0	0	0
Contract with Customer, Receivable, after Allowance for Credit Loss				$ 13,200
Contract with Customer, Liability, Revenue Recognized, Including Balance		700	0
Contract with Customer, Liability, Cost of Revenue Recognized	$ 0
Transferred over Time [Member]
Contract with Customer, Liability, Revenue Recognized		1,300	200
Shipping and Handling [Member]
Cost of Goods and Services Sold		$ 300	$ 500