Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues
Product revenues	$ 27,211	$ 22,891	$ 18,143
Product revenues from related party			167
Service revenues	13,065	11,651	8,770
Royalties	14,297	3,745	5,599
Royalties from related party			714
Total revenues	54,573	38,287	33,393
Cost of product revenues	15,595	13,053	10,470
Cost of service revenues	8,698	8,361	7,219
Total cost of revenues	24,293	21,414	17,689
Gross profit	30,280	16,873	15,704
Operating expenses
Sales and marketing	1,259	1,249	1,708
Research and development	9,676	7,039	663
General and administrative	14,066	10,458	8,589
Total operating expenses	25,001	18,746	10,960
Income (loss) from operations	5,279	(1,873)	4,744
Interest expense, net	(97)	(106)	(118)
Change in fair value of common stock warrant liability	0	0	379
Other income, net	860	488	302
Income (loss) before income taxes	6,042	(1,491)	5,307
Provision for income taxes	91	5	651
Net income (loss)	$ 5,951	$ (1,496)	$ 4,656
Basic net income (loss) per common share	$ 0.55	$ (0.14)	$ 0.42
Diluted net income (loss) per common share	$ 0.55	$ (0.14)	$ 0.39
Basic weighted average common shares outstanding	10,795	10,774	10,992
Diluted weighted average common shares outstanding	10,891	10,774	11,007