Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating expenses:
Research and development	$ 9,096,122	$ 3,678,444
General and administrative	2,776,468	729,326
Total operating expenses	11,872,590	4,407,770
Other income (expense):
Interest income (expense)	224,442	(3,348)
Foreign currency gain	2,247,891	935,916
Total other income (expense)	2,472,333	932,568
Net loss	(9,400,257)	(3,475,202)
Other comprehensive income (loss):
Foreign currency translation	(2,424,653)	(2,031,175)
Total comprehensive loss	$ (11,824,910)	$ (5,506,377)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.45)	$ (2.97)
Weighted-average common shares outstanding, basic and diluted (in shares)	21,052,726	1,171,193