Quarterly report pursuant to sections 13 or 15(d)

Goodwill (Details)

v2.4.0.6
Goodwill (Details) (USD $)
6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Dec. 31, 2010
Jun. 30, 2012
LED Replacement Lamps [Member]
Jun. 30, 2012
LED Replacement Lamps [Member]
Dec. 31, 2011
LED Replacement Lamps [Member]
Dec. 31, 2010
LED Replacement Lamps [Member]
Dec. 31, 2011
LED Signage and Lighting Strips [Member]
Jun. 30, 2012
LED Signage and Lighting Strips [Member]
Dec. 31, 2010
LED Signage and Lighting Strips [Member]
Changes in carrying amount of goodwill                    
Goodwill, gross $ 2,396,289 $ 2,396,289 $ 2,396,289 $ 1,988,920 $ 1,988,920 $ 1,988,920 $ 1,988,920 $ 407,369 $ 407,369 $ 407,369
Accumulated impairment losses (2,396,289) (407,369)   (1,988,920) (1,988,920)     (407,369) (407,369)  
Goodwill, net    1,988,920 2,396,289       1,988,920 1,988,920      407,369
Impairment losses $ (1,988,920) $ (407,369)   $ (1,988,920) $ (1,988,920)     $ (407,369)