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13. Segment Information (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Revenues    
India $ 32,816,122 $ 13,547,620
North America 144,697,850 175,500,606
Total revenues 177,513,972 189,048,226
Cost of goods sold    
India 28,722,704 14,191,098
North America 130,497,508 183,784,075
Total cost of goods sold 159,220,212 197,975,173
Gross profit/(loss)    
India 4,093,418 (643,478)
North America 14,200,342 (8,283,469)
Total gross profit/(loss) $ 18,293,760 $ (8,926,947)