Business Segment Information (Tables)

12 Months Ended

Dec. 31, 2016

Business Segment Information

Schedule of Geographic Net Sales Information

	Year ended
	December 31,
Geographic net sales information (in thousands)	2016		2015		2014
United States	$	104,995	$	67,698	$	42,932
International		9,402		4,002		2,655
Total net sales	$	114,397	$	71,700	$	45,587

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,
	2016		2015		2014		2016		2015		2014		2016		2015		2014
United States	$	7,463	$	2,012	$	1,784	$	4,654	$	4,180	$	4,149	$	6,493	$	972	$	749
International		130		142		166		68		87		82		56		62		68
Total	$	7,593	$	2,154	$	1,950	$	4,722	$	4,267	$	4,231	$	6,549	$	1,034	$	817