7. Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues
North America	$ 35,465	$ 32,038	$ 65,418	$ 60,090
India	5,299	1,021	6,920	6,295
Total revenues	40,764	33,059	72,338	66,385
Cost of goods sold
North America	34,359	29,624	65,008	55,783
India	4,700	1,491	6,212	6,572
Total cost of goods sold	39,059	31,115	71,220	62,355
Gross profit (loss)
North America	1,106	2,414	410	4,307
India	599	(470)	708	(277)
Total gross profit	$ 1,705	$ 1,944	$ 1,118	$ 4,030