Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating expenses
Research and development	$ 4,827	$ 4,490	$ 17,625	$ 10,995
General and administrative	2,256	1,615	6,507	5,322
Change in fair value of contingent consideration	774	28	4,200	417
Total operating expenses	7,857	6,133	28,332	16,734
Operating loss	(7,857)	(6,133)	(28,332)	(16,734)
Other income (expense)
Change in fair value of warrants liabilities	(689)	7,116	6,532	930
Loss from minority interest investment		(123)		(478)
Interest income	1	29	13	133
Total other income (expense)	(688)	7,022	6,545	585
Net income (loss)	$ (8,545)	$ 889	$ (21,787)	$ (16,149)
Net income (loss) per common share:
Basic	$ (0.11)	$ 0.03	$ (0.38)	$ (0.51)
Diluted	$ (0.11)	$ (0.19)	$ (0.38)	$ (0.53)
Weighted-average common shares outstanding used in per-share calculation:
Basic	79,583,254	31,793,292	56,916,137	31,775,590
Diluted	79,583,254	32,443,647	56,916,137	32,235,528