Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating expenses:
Research and development	$ 2,985	$ 5,389	$ 6,556	$ 12,632
General and administrative	2,085	3,284	4,345	6,635
Total operating expenses	5,070	8,673	10,901	19,267
Loss from operations	(5,070)	(8,673)	(10,901)	(19,267)
Other income (expense):
Interest income	7	237	48	471
Interest expense	(242)	(314)	(518)	(632)
Change in fair value of derivative liability	(236)	(32)	(556)	(89)
Realized foreign exchange loss		(1)		(8)
Total other expense	(471)	(110)	(1,026)	(258)
Loss before income tax expense	(5,541)	(8,783)	(11,927)	(19,525)
Income tax expense	(16)	(26)	(32)	(55)
Net loss	$ (5,557)	$ (8,809)	$ (11,959)	$ (19,580)
Net loss per share - basic and diluted	$ (0.41)	$ (1.33)	$ (1.16)	$ (3.00)
Basic and diluted weighted average shares outstanding	13,602,793	6,615,140	10,334,589	6,525,611