Note 2 - Business Segment Information (Details) - Summarized Financial Information by Reportable Business Segments Identifiable Assets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Segment Reporting Information [Line Items]
Identifiable Assets	$ 169,179	$ 175,226	$ 176,021	$ 173,845	$ 153,118
Lighting Segment [Member]
Segment Reporting Information [Line Items]
Identifiable Assets	90,536	93,661
Graphics Segment [Member]
Segment Reporting Information [Line Items]
Identifiable Assets	28,792	27,377
Electronics Components Segment [Member]
Segment Reporting Information [Line Items]
Identifiable Assets	30,926	31,805
All Other Category [Member]
Segment Reporting Information [Line Items]
Identifiable Assets	6,361	8,185
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Identifiable Assets	12,564	14,198
Total [Member]
Segment Reporting Information [Line Items]
Identifiable Assets	$ 169,179	$ 175,226