CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF OPERATIONS
License revenue	$ 1,500
Operating expenses:
Research and development	20,423	$ 24,366
General and administrative	9,616	9,085
Total operating expenses	30,039	33,451
Loss from operations	(28,539)	(33,451)
Interest income	93	313
Interest expense	(39)	(23)
Australian research and development incentives	231	132
Foreign currency gains	738	126
Loss before income taxes	(27,516)	(32,903)
Income taxes	2	3
Net loss	(27,514)	(32,900)
Dividend attributable to down round feature of warrants	(303)	(359)
Dividend attributable to Series A & B convertible preferred stock	(372)
Series A & B convertible preferred stock - beneficial conversion feature	(9,399)
Net loss attributable to common stockholders	$ (37,588)	$ (33,259)
Net loss per share
Basic (in dollars per share)	$ (0.63)	$ (1.47)
Diluted (in dollars per share)	$ (0.63)	$ (1.47)
Weighted average common shares outstanding
Basic (in shares)	59,327,713	22,582,687
Diluted (in shares)	59,327,713	22,582,687