CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Revenue, net	$ 189,903	$ 130,449	$ 78,424
Cost of goods sold	129,450	86,203	55,396
Gross profit	60,453	44,246	23,028
Operating expenses
Research and development	20,852	15,970	8,512
Sales and marketing	6,381	6,043	4,191
General and administrative	19,771	17,095	10,632
Total operating expenses	47,004	39,108	23,335
Income (loss) from operations	13,449	5,138	(307)
Other income (expense)
Interest income	328	369	104
Interest expense	(1,018)	(326)	(1,125)
Other expense, net	(1,591)	(699)	(78)
Total other expense	(2,281)	(656)	(1,099)
Income (loss) before income taxes	11,168	4,482	(1,406)
Income taxes	(375)	(199)	0
Net income (loss)	$ 10,793	$ 4,283	$ (1,406)
Net income (loss) per share - Basic	$ 0.69	$ 0.30	$ (.14)
Net income (loss) per share - Diluted	$ .65	$ 0.28	$ (.14)
Weighted average shares used to compute net income (loss) per share: basic	15,626,753	14,307,477	9,964,955
Weighted average shares used to compute net income (loss) per share: Diluted	16,532,850	15,186,961	9,964,955