Note 3 - Segment Reporting Information - Identifiable Assets by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016
Lighting Segment [Member]
Identifiable Assets:
Identifiable Assets	$ 92,293	$ 95,168
Graphics Segment [Member]
Identifiable Assets:
Identifiable Assets	35,612	33,490
Technology Segment [Member]
Identifiable Assets:
Identifiable Assets	27,910	28,348
Corporate and Eliminations [Member]
Identifiable Assets:
Identifiable Assets	37,010	38,554
Identifiable Assets	$ 192,825	$ 195,560