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13. Segment Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Revenues    
North America $ 129,408 $ 195,416
India 17,241 12,267
Total revenues 146,649 207,683
Cost of goods sold    
North America 126,290 158,719
India 16,160 11,820
Total cost of goods sold 142,450 170,539
Gross profit (loss)    
North America 3,118 36,697
India 1,081 447
Total gross profit $ 4,199 $ 37,144