Condensed Consolidated Statements of Stockholders’ Equity - USD ($)	Common Stock	Additional Paid-in capital	Accumulated other comprehensive loss	Accumulated deficit	Total
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
Equity, beginning balance at Dec. 31, 2020	$ 21,187	231,418,356	(10,037,261)	(144,007,075)	77,395,207
Equity, beginning balance (in shares) at Dec. 31, 2020	21,186,827
Increase (Decrease) in Stockholders' Equity
Stock‑based compensation		1,822,562			1,822,562
Foreign currency translation			(402,850)		(402,850)
Net loss				(9,668,755)	(9,668,755)
Equity, ending balance at Mar. 31, 2021	$ 21,187	$ 233,240,918	$ (10,440,111)	$ (153,675,830)	$ 69,146,164
Equity, ending balance (in shares) at Mar. 31, 2021	21,186,827