Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net loss	$ (14,987,069)	$ (10,848,601)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	8,853	6,521
Stock-based compensation	531,134	249,645
Amortization of right of use lease asset	109,546
Foreign currency gain	(2,591,008)	(741,616)
Changes in operating assets and liabilities:
Deferred offering costs	(4,244,276)
Prepaid expense and other current assets	(46,981)	84,080
Accounts payable	2,000,482	(216,116)
Accrued expenses and other liabilities	3,111,906	67,122
Lease liability	(102,996)
Net cash used in operating activities	(16,210,409)	(11,398,965)
Cash flows from investing activities:
Purchases of property and equipment	(16,435)	(4,506)
Net cash used in investing activities	(16,435)	(4,506)
Cash flows from financing activities:
Proceeds from the exercise of stock options	23,118	1,415
Proceeds from issuance of Series C preferred stock, net	5,598,362
Net cash provided by financing activities	5,621,480	1,415
Decrease in cash	(10,605,364)	(11,402,056)
Effect of exchange rate changes on cash and cash equivalents	(2,736,465)	(645,333)
Cash and cash equivalents-beginning of period	65,675,931	24,401,488
Cash and cash equivalents-end of period	52,334,102	$ 12,354,099
Non-cash activities:
Cumulative effect of change in accounting principle-ASC 842 adoption	$ 329,384