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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Revenues [Abstract]        
Revenue $ 6,130,544 $ 8,026,325 $ 13,236,059 $ 16,275,712
Cost of revenue 3,713,147 5,849,002 8,158,276 11,974,402
Inventory obsolescence 0 27,178 0 3,720,073
Gross profit 2,417,397 2,150,145 5,077,783 581,237
Operating expenses:        
Selling expenses 627,442 701,687 1,447,847 1,513,741
General and administrative expenses 382,832 591,251 806,759 1,164,263
Research and development expenses 1,902,027 865,249 2,346,434 1,031,664
Bad debt expense (benefit) 8,032,315 4,752,733 11,340,444 4,632,803
Total operating expenses 10,944,616 6,910,920 15,941,484 8,342,471
(Loss) income from operations (8,527,219) (4,760,775) (10,863,701) (7,761,234)
Other income (expense):        
Interest income 16,828 1,016 38,611 2,602
Interest expense (113,363) (92,049) (169,810) (174,494)
Net other expense (96,535) (91,033) (131,199) (171,892)
(Loss) income before income taxes (8,623,754) (4,851,808) (10,994,900) (7,933,126)
Income tax benefit (expense) (19,196) 387,983 (38,543) 656,994
Net (loss) income (8,642,950) (4,463,825) (11,033,443) (7,276,132)
Other comprehensive income - foreign currency translation adjustment 153,664 2,218,896 (961,320) 3,038,663
Comprehensive (loss) income $ (8,489,286) $ (2,244,929) $ (11,994,763) $ (4,237,469)
Loss per share:        
Basic $ (0.20) $ (0.10) $ (0.25) $ (0.17)
Diluted $ (0.20) $ (0.10) $ (0.25) $ (0.17)