Note 9 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 28, 2023	Sep. 30, 2023	Sep. 30, 2022
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		$ (244)	$ 54
Depreciation		3,700	4,100
Impairment of Intangible Assets, Finite-Lived		$ 0	$ 401
Satellite Property [Member]
Proceeds from Sale of Property, Plant, and Equipment	$ 3,700
Payment of Closing Costs for Sale of Property	300
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ 1,300