Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating expenses
Research and development	$ 16,267	$ 7,178
General and administrative	6,930	6,556
Change in fair value of contingent consideration	289	567
Total operating expenses	23,486	14,301
Operating loss	(23,486)	(14,301)
Other (expense) income
Change in fair value of warrants liabilities	(6,964)	522
Gain on deconsolidation of former subsidiary		1,994
Loss from minority interest investment	(478)	(160)
Interest and other income	154	104
Total other (expense) income	(7,288)	2,460
Loss from continuing operations	(30,774)	(11,841)
Loss from discontinued operations		(1,494)
Net loss	$ (30,774)	$ (13,335)
Loss per common share from continuing operations, basic and diluted	$ (0.90)	$ (0.56)
Loss per common share from discontinued operations, basic and diluted		(0.07)
Net loss per common share, basic and diluted	$ (0.90)	$ (0.64)
Weighted-average common shares outstanding used to calculate basic and diluted net loss per common share	34,142,478	20,975,479