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Note 2 - Business Segment Information (Details) - Identifiable Assets by Segment - USD ($) $ in Thousands | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2011
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Identifiable Assets: |  |  |  |  |
Identifiable Assets | $ 182,379 | $ 169,888 | $ 169,179 | $ 175,226 | $ 176,021
Corporate and Eliminations [Member] |  |  |  |  |
Identifiable Assets: |  |  |  |  |
Identifiable Assets | 33,766 | 15,316 |  |  |
Lighting Segment [Member] |  |  |  |  |
Identifiable Assets: |  |  |  |  |
Identifiable Assets | 90,713 | 93,847 |  |  |
Graphics Segment [Member] |  |  |  |  |
Identifiable Assets: |  |  |  |  |
Identifiable Assets | 29,477 | 24,425 |  |  |
Technology Segment [Member] |  |  |  |  |
Identifiable Assets: |  |  |  |  |
Identifiable Assets | $ 28,423 | 33,440 |  |  |
All Other Category [Member] |  |  |  |  |
Identifiable Assets: |  |  |  |  |
Identifiable Assets |  | $ 2,860 |  |  |

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 + Details
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