Composition of Certain Financial Statement Items (Schedule of Equipment and leasehold improvements) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Property, Plant and Equipment [Line Items]
Total gross	$ 9,227	$ 8,645
Less: Accumulated depreciation and amortization	(7,798)	(7,423)
Property, plant and equipment, net	1,429	1,222
Office Furnishings and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total gross	1,819	1,761
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total gross	5,289	4,796
Leasehold & Improvement [Member]
Property, Plant and Equipment [Line Items]
Total gross	$ 2,119	$ 2,088