Note 3 - Business Segment Information (Details) - Inter-segment Revenues (USD $) In Thousands, unless otherwise specified	3 Months Ended
Sep. 30, 2013	Sep. 30, 2012
Lighting Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Inter-segment net sales	$ 898	$ 657
Graphics Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Inter-segment net sales	205	837
Electronics Components Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Inter-segment net sales	8,504	6,336
All Other Category [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Inter-segment net sales	$ 2,155	$ 866

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration