8. Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues
North America	$ 36,012	$ 33,889	$ 101,430	$ 93,979
India	2,923	5,488	9,843	11,783
Total revenues	38,935	39,377	111,273	105,762
Cost of goods sold
North America	33,995	30,391	99,003	86,174
India	2,985	5,320	9,197	11,892
Total cost of goods sold	36,980	35,711	108,200	98,066
Gross profit (loss)
North America	2,017	3,498	2,427	7,805
India	(62)	168	646	(109)
Total gross profit (loss)	$ 1,955	$ 3,666	$ 3,073	$ 7,696