Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cost of product revenue, related party activity	$ 234	$ 191	$ 235
Stock compensation expense in cost of goods sold	86	55	24
Stock compensation expense in research and development expenses	718	513	180
Stock compensation expense in selling, general and administrative expenses	5,346	4,143	1,912
Product revenue
Related party revenue	720	294	339
Service and other revenue
Related party revenue	118	149	165
Stock compensation expense in cost of goods sold	238	173	52
Collaboration and license revenue
Related party revenue	$ 0	$ 2,150	$ 1,074