Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities:
Net loss	$ (4,252,248)	$ (3,051,840)
Non-cash adjustments reconciling net loss to operating cash flows:
Depreciation	11,949	1,150
Stock-based compensation	160,841	97,968
Non-cash operating lease cost	(55,786)	419
Changes in operating assets and liabilities:
Other receivables	125,488	(135,676)
Prepaid expenses	(2,736,149)	(201,129)
Other non-current assets	38,682	55,233
Accounts payable	448,314	(134,087)
Accrued expenses	(408,027)	59,478
Deferred grant funding	(930,610)	0
Deferred license revenue	1,000,000	0
Net cash used in operating activities	(6,597,546)	(3,308,484)
Financing activities:
Net proceeds from issuance of common stock	5,222,687	0
Proceeds from the exercise of common stock warrants	1,665,020	0
Proceeds from the exercise of stock options	1	0
Net cash provided by financing activities	6,887,708	0
Effect of exchange rate changes on cash and cash equivalents	(22,944)	7,621
Net change in cash and cash equivalents	267,218	(3,300,863)
Cash and cash equivalents, beginning of period	4,780,107	6,805,889
Cash and cash equivalents, end of period	5,047,325	3,505,026
Supplemental disclosure of non-cash operating and financing activities:
Operating right-of-use assets obtained in exchange for new operating lease liabilities	$ 0	$ 231,698