Note 3 - Business Segment Information (Detail) - Inter-segment Revenues (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Lighting Segment [Member]
Inter-segment net sales	$ 583	$ 522	$ 2,095	$ 1,690
Graphics Segment [Member]
Inter-segment net sales	318	576	1,604	901
Electronics Components Segment [Member]
Inter-segment net sales	6,654	7,117	20,273	16,854
All Other Category [Member]
Inter-segment net sales	$ 2,227	$ 783	$ 4,481	$ 4,274