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Changes in Carrying Amount of Goodwill (Detail) (USD $)
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9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | |||
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Sep. 30, 2013
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Dec. 31, 2012
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Sep. 30, 2013
LED Replacement Lamps and Fixtures
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Sep. 30, 2012
LED Replacement Lamps and Fixtures
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Dec. 31, 2012
LED Replacement Lamps and Fixtures
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Dec. 31, 2011
LED Singnage and Lighting Strips
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Sep. 30, 2013
LED Singnage and Lighting Strips
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| Goodwill [Line Items] | |||||||
| Goodwill, Beginning Balance | $ 10,165,993 | $ 1,988,920 | $ 10,165,993 | $ 1,988,920 | $ 1,988,920 | ||
| Business acquisition | 7,183,693 | 10,165,993 | 7,183,693 | 10,165,993 | |||
| Impairment loss | (1,988,920) | (1,988,920) | (1,988,920) | (407,369) | |||
| Goodwill, Ending Balance | 17,349,686 | 10,165,993 | 17,349,686 | 10,165,993 | |||
| Goodwill | 19,745,975 | 19,337,606 | 407,369 | ||||
| Accumulated impairment losses | $ (2,396,289) | $ (1,988,920) | $ (407,369) | ||||
| X | ||||||||||
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- Definition
Amount after accumulated impairment loss of an asset representing 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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- Definition
Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before accumulated impairment loss of an asset representing 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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- Definition
Amount of accumulated impairment loss for an asset representing 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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- 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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