Note 3 - Business Segment Information (Details) - Inter-segment Revenues (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Lighting Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Inter-segment net sales	$ 556	$ 583	$ 2,379	$ 2,095
Graphics Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Inter-segment net sales	280	318	680	1,604
Electronics Components Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Inter-segment net sales	8,116	6,654	26,070	20,273
All Other Category [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Inter-segment net sales	$ 1,865	$ 2,227	$ 6,057	$ 4,481