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	$ 3,670	$ 5,979	$ 10,498	$ 19,146
General and administrative	5,291	2,404	9,364	8,504
Total operating expenses	8,961	8,383	19,862	27,650
Loss from operations	(8,961)	(8,383)	(19,862)	(27,650)
Other income (expense):
Interest income	22	176	70	647
Interest expense	(212)	(312)	(730)	(944)
Change in fair value of derivative liability		(7)	(556)	(96)
Realized foreign exchange loss	1		1	(8)
Total other expense	(189)	(143)	(1,215)	(401)
Loss before income tax expense	(9,150)	(8,526)	(21,077)	(28,051)
Income tax expense		(26)	(32)	(81)
Net loss	$ (9,150)	$ (8,552)	$ (21,109)	$ (28,132)
Net loss per share - basic and diluted	$ (0.18)	$ (1.27)	$ (0.88)	$ (4.26)
Basic and diluted weighted average shares outstanding	50,939,657	6,752,143	23,968,408	6,601,951