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13. Segment Information (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Revenues    
India $ 11,541,193 $ 2,313,697
North America 7,879,021 41,882,079
Other      
Total revenues 19,420,214 44,195,776
Cost of goods sold    
India 10,754,775 2,407,589
North America 8,417,725 44,046,699
Other      
Total cost of goods sold 19,172,500 46,454,288
Gross profit/(loss)    
India 786,418 (93,892)
North America (538,704) (2,164,620)
Other      
Total gross profit/(loss) $ 247,714 $ (2,258,512)