Note 3 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Jun. 30, 2024
Property and equipment, gross	$ 9,928	$ 9,815
Less: Accumulated depreciation and amortization	(8,117)	(7,930)
Total	1,811	1,885
Land and Building [Member]
Property and equipment, gross	1,250	1,250
Leasehold Improvements [Member]
Property and equipment, gross	1,341	1,341
Machinery and Equipment [Member]
Property and equipment, gross	$ 7,264	$ 7,224