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Goodwill - Additional Information (Detail) (USD $)
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12 Months Ended | 3 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2011
LED Signage and Lighting Strips
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Jun. 30, 2012
LED Replacement Lamps and Fixtures
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Dec. 31, 2012
LED Replacement Lamps and Fixtures
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| Goodwill [Line Items] | ||||
| Impairment charge | $ 1,989,000 | $ 407,000 | $ 1,989,000 | $ 1,989,000 |
| X | ||||||||||
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- Definition
Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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