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Condensed Consolidated Statements of Operations and Comprehensive Loss - 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	$ 615	$ 1,509	$ 3,095	$ 6,795
General and administrative	3,731	1,411	6,730	5,089
Restructuring expense	1,802		2,292
Total operating expenses	6,148	2,920	12,117	11,884
Loss from operations	(6,148)	(2,920)	(12,117)	(11,884)
Other income, net	4	27	39	17
Warrant inducement expense			(4,829)
Net loss and comprehensive loss	$ (6,144)	$ (2,893)	$ (16,907)	$ (11,867)
Net loss per share, basic and diluted	$ (5.51)	$ (4.01)	$ (16.81)	$ (18.74)
Weighted-average common shares outstanding, basic and diluted	1,114,133	720,829	1,006,008	633,187

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