Note 9 - Sales to Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Geographic Concentration Risk [Member] | UNITED STATES
Revenue, Net	$ 5,122	$ 8,428
Geographic Concentration Risk [Member] | CHINA
Revenue, Net	2,797	2,500
Geographic Concentration Risk [Member] | Asia - Other [Member]
Revenue, Net	1,955	1,955
Geographic Concentration Risk [Member] | Europe [Member]
Revenue, Net	1,343	2,147
Geographic Concentration Risk [Member] | All Other Countries [Member]
Revenue, Net	712	1,012
Revenue, Net	$ 11,929	$ 16,042