Annual report pursuant to section 13 and 15(d)

Changes in Carrying Amount of Goodwill (Detail)

v2.4.0.6
Changes in Carrying Amount of Goodwill (Detail) (USD $)
3 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]      
Goodwill, Beginning Balance   $ 1,988,920 $ 2,396,289
Seesmart acquisition   11,456,593  
Impairment loss   (1,988,920) (407,369)
Goodwill, Ending Balance   11,456,593 1,988,920
Goodwill   13,852,882  
Accumulated impairment losses   (2,396,289)  
Goodwill, Ending Balance   11,456,593 1,988,920
LED Replacement Lamps and Fixtures
     
Finite-Lived Intangible Assets [Line Items]      
Goodwill, Beginning Balance   1,988,920 1,988,920
Seesmart acquisition   11,456,593  
Impairment loss (1,988,920) (1,988,920) (407,369)
Goodwill, Ending Balance   11,456,593 1,988,920
Goodwill   13,445,513  
Accumulated impairment losses   (1,988,920)  
Goodwill, Ending Balance   11,456,593 1,988,920
LED signage and lighting strips
     
Finite-Lived Intangible Assets [Line Items]      
Goodwill, Beginning Balance     407,369
Impairment loss     (407,369)
Goodwill   407,369  
Accumulated impairment losses   $ (407,369)