Note 2 - Revenue Recognition - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Total revenue	$ 37,223	$ 50,032
Product [Member]
Total revenue	32,645	43,714
Asia [Member] | Product [Member]
Total revenue	18,057	32,216
CANADA | Product [Member]
Total revenue	369	1,226
Europe [Member] | Product [Member]
Total revenue	1,398	1,378
MEXICO | Product [Member]
Total revenue	1,281	166
UNITED STATES | Product [Member]
Total revenue	11,423	8,418
Other [Member] | Product [Member]
Total revenue	$ 117	$ 310