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7. Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Revenues    
North America $ 29,953 $ 28,052
India 1,621 5,274
Total revenues 31,574 33,326
Cost of goods sold    
North America 30,649 26,159
India 1,512 5,081
Total cost of goods sold 32,161 31,240
Gross profit (loss)    
North America (696) 1,893
India 109 193
Total gross profit (loss) $ (587) $ 2,086