Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders’ Deficit - USD ($)	Common Stock	Additional Paid-in capital	Accumulated other comprehensive loss	Accumulated deficit	Series A convertible preferred stock	Series B convertible preferred stock	Series C convertible preferred stock	Total
Temporary equity, beginning balance at Dec. 31, 2018					$ 6,483,044	$ 49,742,942	$ 56,364,645
Temporary Equity, Beginning Balance (in shares) at Dec. 31, 2018					612,446	7,235,969	4,712,698
Increase (Decrease) in Temporary Equity
Issuance of convertible preferred stock, net of issuance costs							$ 5,598,362
Issuance of convertible preferred stock (in shares)							467,179
Temporary equity, ending balance at Mar. 31, 2019					$ 6,483,044	$ 49,742,942	$ 61,963,007
Temporary Equity, Ending Balance (in shares) at Mar. 31, 2019					612,446	7,235,969	5,179,877
Equity, beginning balance at Dec. 31, 2018	$ 127,091	$ 19,666,588	$ (8,761,325)	$ (62,468,456)				$ (51,436,102)
Equity, Beginning Balance (in shares) at Dec. 31, 2018	1,155,366
Increase (Decrease) in Stockholders' Equity
Exercise of stock options	$ 2,883	20,235						23,118
Exercise of stock options (in shares)	26,207
Stock based compensation		97,946						97,946
Foreign currency translation			(2,031,175)					(2,031,175)
Net loss				(3,475,202)				(3,475,202)
Equity, ending balance at Mar. 31, 2019	$ 129,974	19,784,769	(10,792,500)	(65,943,658)				(56,821,415)
Equity, Ending Balance (in shares) at Mar. 31, 2019	1,181,573
Equity, beginning balance at Dec. 31, 2019	$ 21,023	226,284,548	(11,533,778)	(90,528,263)				124,243,530
Equity, Beginning Balance (in shares) at Dec. 31, 2019	21,022,752
Increase (Decrease) in Stockholders' Equity
Exercise of stock options	$ 32	29,491						29,523
Exercise of stock options (in shares)	32,090
Stock based compensation		905,471						905,471
Foreign currency translation			(2,424,653)					(2,424,653)
Net loss				(9,400,257)				(9,400,257)
Equity, ending balance at Mar. 31, 2020	$ 21,055	$ 227,219,510	$ (13,958,431)	$ (99,928,520)				$ 113,353,614
Equity, Ending Balance (in shares) at Mar. 31, 2020	21,054,842