Stock-Based Compensation (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Total	$ 3,367	$ 2,687	$ 1,475
Cost Of Sales [Member]
Total	312	279	192
Research And Development [Member]
Total	303	208	293
Clinical And Regulatory [Member]
Total	173	235	113
Selling And Marketing [Member]
Total	104	442	141
General And Administrative [Member]
Total	$ 2,475	$ 1,523	$ 736