Note 2 - Business Segment Information (Details) - Inter-segment revenues (Intersegment Eliminations [Member], USD $)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Lighting Segment [Member]
Note 2 - Business Segment Information (Details) - Inter-segment revenues [Line Items]
Inter-segment net sales	$ 2,746,000	$ 2,457,000	$ 3,530,000
Graphics Segment [Member]
Note 2 - Business Segment Information (Details) - Inter-segment revenues [Line Items]
Inter-segment net sales	1,854,000	1,581,000	1,024,000
Electronics Components Segment [Member]
Note 2 - Business Segment Information (Details) - Inter-segment revenues [Line Items]
Inter-segment net sales	26,522,000	22,019,000	25,570,000
All Other Category [Member]
Note 2 - Business Segment Information (Details) - Inter-segment revenues [Line Items]
Inter-segment net sales	$ 6,710,000	$ 5,805,000	$ 5,568,000