Note 3 - Property and Equipment, Net (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Property, Plant and Equipment, Disposals	$ 86	$ 83	$ 267	$ 247
Fully Depreciated Property [Member]
Property, Plant and Equipment, Disposals			20	$ 147
Equipment [Member]
Gain (Loss) on Disposition of Property Plant Equipment			$ 22