Note 2 - Revenue Recognition - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Total revenue	$ 50,032	$ 31,109
Product [Member]
Total revenue	43,714	19,548
Asia [Member] | Product [Member]
Total revenue	32,216	6,534
CANADA | Product [Member]
Total revenue	1,226	761
Europe [Member] | Product [Member]
Total revenue	1,378	1,134
UNITED STATES | Product [Member]
Total revenue	8,418	10,591
Other [Member] | Product [Member]
Total revenue	$ 476	$ 528