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10. Segment Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Revenues    
North America $ 128,706 $ 129,408
India 14,452 17,241
Total revenues 143,158 146,649
Cost of goods sold    
North America 117,040 126,290
India 14,519 16,160
Total cost of goods sold 131,559 142,450
Gross profit (loss)    
North America 11,666 3,118
India (67) 1,081
Total gross profit $ 11,599 $ 4,199