Note 2 - Identifiable Assets by Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Lighting Segment [Member]
Identifiable Assets:
Identifiable Assets	$ 95,168	$ 90,713
Graphics Segment [Member]
Identifiable Assets:
Identifiable Assets	32,450	29,477
Technology Segment [Member]
Identifiable Assets:
Identifiable Assets	29,388	28,423
All Other Category [Member]
Identifiable Assets:
Identifiable Assets
Corporate and Eliminations [Member]
Identifiable Assets:
Identifiable Assets	38,554	32,077
Identifiable Assets	$ 195,560	$ 180,690	$ 168,688	$ 169,179	$ 175,226