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Note 2 - Revenue Recognition - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Total revenue	$ 25,858	$ 32,715	$ 100,160	$ 95,194
Product [Member]
Total revenue	20,223	19,727	83,434	56,976
Asia [Member] | Product [Member]
Total revenue	3,430	3,287	39,318	11,264
CANADA | Product [Member]
Total revenue	178	85	2,406	1,179
Europe [Member] | Product [Member]
Total revenue	1,137	1,856	4,022	4,782
UNITED STATES | Product [Member]
Total revenue	14,436	13,481	35,685	37,551
Other [Member] | Product [Member]
Total revenue	$ 1,042	$ 1,018	$ 2,003	$ 2,200

X

- Definition

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