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Note 7 - Goodwill and Other Intangible Assets (Details Textual) |  | 1 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 01, 2016 USD ($) | Mar. 31, 2016 USD ($) | Jun. 30, 2015 USD ($) | Sep. 30, 2014 USD ($)
Lighting Segment [Member] |  |  |  |
Good will Impairment Testing Value Above Carrying Value | $ 89,000,000 |  |  |
Good will Impairment Testing Percent Value Above Carrying Value | 112.00% |  |  |
Graphics Segment [Member] |  |  |  |
Good will Impairment Testing Value Above Carrying Value | $ 1,700,000 |  |  |
Good will Impairment Testing Percent Value Above Carrying Value | 183.00% |  |  |
Technology Segment [Member] |  |  |  |
Good will Impairment Testing Value Above Carrying Value | $ 15,400,000 |  |  |
Good will Impairment Testing Percent Value Above Carrying Value | 59.00% |  |  |
Customer Relationships [Member] | LSI Saco [Member] |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  | $ 1,036,000
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  | $ 428,000
Customer Relationships [Member] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | $ 9,316,000 | $ 9,316,000 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 7,509,000 | 7,290,000 |
Number of Reporting Units | 3 |  |  |
Impairment of Long-Lived Assets Held-for-use |  | 0 |  |
Indefinite Lived Intangible Assets Impairment Testing Value Above Carrying Value | $ 8,400,000 |  |  |
Indefinite Lived Intangible Assets Impairment Testing Percent Value Above Carrying Value | 245.00% |  |  |
Finite-Lived Intangible Assets, Gross |  | 22,052,000 | 22,052,000 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 19,761,000 | $ 19,382,000 |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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