Condensed Consolidated Statements Of Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Condensed Consolidated Statements Of Comprehensive Loss [Abstract]
Product revenue		$ 25		$ 35
Cost of sales		(25)		(35)
Gross margin
Research and development expenses				334
Selling, general and administrative expenses	2,328	1,851	$ 7,823	4,007
Total operating expenses	2,328	1,851	7,823	4,341
Interest expense	(115)	(76)	(301)	(138)
Change in fair value of contingent payment obligations	(1,142)	365	(3,382)	823
Total interest and other	(1,257)	289	(3,683)	685
Net loss	(3,585)	(1,562)	(11,506)	(3,656)
Other comprehensive loss, net of tax
Comprehensive loss	$ (3,585)	$ (1,562)	$ (11,506)	$ (3,656)
Basic and diluted net loss per common share	$ (0.08)	$ (0.05)	$ (0.27)	$ (0.12)
Weighted average common shares outstanding	45,393	30,888	41,861	30,042