Consolidated Statements of Operations and Comprehensive Loss - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating expenses:
Research and development	$ 23,895,875	$ 37,879,325	$ 20,950,672
General and administrative	13,550,478	14,931,887	8,593,626
Total operating expenses	37,446,353	52,811,212	29,544,298
Other income (expense):
Interest income, net	1,648	222,652	156,351
Foreign currency gain (loss)	317,402	(890,252)	1,328,140
Total other income (expense)	319,050	(667,600)	1,484,491
Net loss	(37,127,303)	(53,478,812)	(28,059,807)
Other comprehensive loss:
Foreign currency translation	(321,695)	1,496,517	(2,772,453)
Total comprehensive loss	$ (37,448,998)	$ (51,982,295)	$ (30,832,260)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (1.74)	$ (2.53)	$ (4.67)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (1.74)	$ (2.53)	$ (4.67)
Weighted-average common shares outstanding, basic (in shares)	21,286,547	21,133,651	6,002,486
Weighted-average common shares outstanding, diluted (in shares)	21,286,547	21,133,651	6,002,486