Business Segment Information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Information

Schedule of Geographic Net Sales Information

	Year ended
	December 31,
Geographic net sales information (in thousands)	2015		2014		2013
United States	$	67,698	$	42,932	$	19,507
International		4,002		2,655		1,439
Total net sales	$	71,700	$	45,587	$	20,946

Schedule of Property and Equipment, net, Depreciation and Amortization, and Capital Expenditures by Geographic Area

	Property and equipment, net						Depreciation and amortization						Capital expenditures
	As of December 31,						Year ended December 31,						Year ended December 31,
	2015		2014		2013		2015		2014		2013		2015		2014		2013
United States	$	2,012	$	1,784	$	1,684	$	4,180	$	4,149	$	1,089	$	972	$	749	$	888
International		142		166		182		87		82		68		62		68		8
Total	$	2,154	$	1,950	$	1,866	$	4,267	$	4,231	$	1,157	$	1,034	$	817	$	896