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Financial Information Relating to Operating Segments (Detail) (USD $)
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3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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| Segment Reporting Information [Line Items] | ||||
| Total revenues from external customers | $ 7,357,307 | $ 1,053,305 | $ 13,668,709 | $ 2,201,552 |
| Segment (loss) income | 331,258 | (4,903,796) | 321,311 | (5,620,512) |
| Corporate expenses | (1,644,547) | (741,004) | (3,783,631) | (1,748,646) |
| Change in fair value of embedded derivative | (3,821,270) | (6,990,353) | ||
| Other income (expense) | 3,457 | (83,644) | 3,489 | (130,472) |
| Loss from continuing operations | (5,134,559) | (5,728,444) | (10,452,641) | (7,499,630) |
| Segment depreciation and amortization | 1,062,322 | 114,130 | 2,045,323 | 231,468 |
| Corporate depreciation and amortization | 5,446 | 27,571 | 10,874 | 106,936 |
| Total depreciation and amortization | 1,067,768 | 141,701 | 2,056,197 | 338,404 |
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Corporate, Non-Segment
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| Segment Reporting Information [Line Items] | ||||
| Other income (expense) | (83,644) | 31 | (130,472) | |
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LED Replacement Lamps and Fixtures
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| Segment Reporting Information [Line Items] | ||||
| Total revenues from external customers | 6,505,097 | 169,724 | 11,966,366 | 459,870 |
| Segment (loss) income | 353,749 | (4,848,361) | 414,245 | (5,470,393) |
| Segment depreciation and amortization | 1,005,456 | 55,652 | 1,929,902 | 110,526 |
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LED Singnage and Lighting Strips
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| Segment Reporting Information [Line Items] | ||||
| Total revenues from external customers | 852,210 | 883,581 | 1,702,342 | 1,741,682 |
| Segment (loss) income | (22,491) | (55,435) | (92,934) | (150,119) |
| Segment depreciation and amortization | $ 56,866 | $ 58,478 | $ 115,421 | $ 120,942 |