Note 3 - Identifiable Assets by Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Lighting Segment [Member]
Identifiable Assets:
Identifiable Assets	$ 87,654	$ 90,713
Graphics Segment [Member]
Identifiable Assets:
Identifiable Assets	33,060	29,477
Technology Segment [Member]
Identifiable Assets:
Identifiable Assets	$ 30,140	$ 28,423
All Other Category [Member]
Identifiable Assets:
Identifiable Assets
Corporate and Eliminations [Member]
Identifiable Assets:
Identifiable Assets	$ 39,408	$ 33,766
Identifiable Assets	$ 190,262	$ 182,379