Note 3 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018
Property and equipment, gross	$ 8,455	$ 8,441
Less: Accumulated depreciation and amortization	(6,851)	(6,790)
Total	1,604	1,651
Land and Building [Member]
Property and equipment, gross	1,250	1,250
Leasehold Improvements [Member]
Property and equipment, gross	1,268	1,268
Machinery and Equipment [Member]
Property and equipment, gross	5,931	5,917
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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