CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues	$ 18,631	$ 10,254	$ 37,745	$ 19,799
Cost of revenues	10,486	5,685	21,656	10,669
Gross margin	8,145	4,569	16,089	9,130
Research and development expenses	2,110	1,913	4,140	3,902
Selling, general and administrative expenses	4,031	3,295	7,537	6,676
Amortization of intangibles	17	16	34	33
Income (loss) from operations	1,987	(655)	4,378	(1,481)
Interest income and other	98	(86)	13	(21)
Income (loss) before income taxes	2,085	(741)	4,391	(1,502)
Income tax provision	44	20	87	40
Net income (loss)	$ 2,041	$ (761)	$ 4,304	$ (1,542)
Net income (loss) per share – Basic (in dollars per share)	$ 0.30	$ (0.11)	$ 0.63	$ (0.23)
Net income (loss) per share – Diluted (in dollars per share)	$ 0.29	$ (0.11)	$ 0.62	$ (0.23)
Weighted average shares outstanding – Basic (in shares)	6,803	6,688	6,790	6,682
Weighted average shares outstanding – Diluted (in shares)	7,051	6,688	6,943	6,682