Note 3 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Jun. 30, 2018
Property and equipment, gross	$ 8,876		$ 8,818
Less: Accumulated depreciation and amortization	(7,131)		(7,040)
Total	1,745	$ 1,778	1,778
Land and Building [Member]
Property and equipment, gross	1,250		1,250
Leasehold Improvements [Member]
Property and equipment, gross	1,282		1,282
Machinery and Equipment [Member]
Property and equipment, gross	6,338		6,280
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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