Note 3 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Property and equipment, gross	$ 9,053	$ 9,008
Less: Accumulated depreciation and amortization	(7,383)	(7,312)
Total	1,670	1,696
Land and Building [Member]
Property and equipment, gross	1,250	1,250
Leasehold Improvements [Member]
Property and equipment, gross	1,327	1,287
Machinery and Equipment [Member]
Property and equipment, gross	6,470	6,465
Transportation Equipment [Member]
Property and equipment, gross	$ 6	$ 6

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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