CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($)	Ordinary Shares [Member] Private Placement [Member]	Ordinary Shares [Member] License Agreement [Member]	Ordinary Shares [Member]	Capital in Excess of Par Value [Member] Private Placement [Member]	Capital in Excess of Par Value [Member] License Agreement [Member]	Capital in Excess of Par Value [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Private Placement [Member]	License Agreement [Member]	Total
Beginning Balance at Dec. 31, 2018			$ 1,064			$ 229,054,460	$ 293,666	$ (148,289,717)			$ 81,059,473
Beginning Balance, Shares at Dec. 31, 2018			27,386,632
Issuance of ordinary shares in connection with a license agreement		$ 6			$ 1,966,334					$ 1,966,340
Issuance of ordinary shares in connection with a license agreement, shares		158,832
Sale of ordinary shares in connection with private placement, net of issuance costs of $2,426,953	$ 225			$ 77,572,822					$ 77,573,047
Sale of ordinary shares in connection with private placement, net of issuance costs, shares	5,797,102
Share-based compensation						2,934,991					2,934,991
Foreign currency translation							(1,133,683)				(1,133,683)
Net loss								(17,981,918)			(17,981,918)
Balance at Mar. 31, 2019			$ 1,295			311,528,607	(840,017)	(166,271,635)			144,418,250
Balance, Shares at Mar. 31, 2019			33,342,566
Beginning Balance at Dec. 31, 2018			$ 1,064			229,054,460	293,666	(148,289,717)			81,059,473
Beginning Balance, Shares at Dec. 31, 2018			27,386,632
Foreign currency translation											446,199
Net loss											(38,804,330)
Balance at Jun. 30, 2019			$ 1,295			315,915,997	739,865	(187,094,047)			129,563,110
Balance, Shares at Jun. 30, 2019			33,342,791
Beginning Balance at Mar. 31, 2019			$ 1,295			311,528,607	(840,017)	(166,271,635)			144,418,250
Beginning Balance, Shares at Mar. 31, 2019			33,342,566
Exercised stock options						1,267					1,267
Exercised stock options, shares			225
Share-based compensation						4,386,123					4,386,123
Foreign currency translation							1,579,882				1,579,882
Net loss								(20,822,412)			(20,822,412)
Balance at Jun. 30, 2019			$ 1,295			315,915,997	739,865	(187,094,047)			129,563,110
Balance, Shares at Jun. 30, 2019			33,342,791
Beginning Balance at Dec. 31, 2019			$ 1,429			395,630,666	(1,794,042)	(203,035,952)			190,802,101
Beginning Balance, Shares at Dec. 31, 2019			36,791,906
Exercised stock options			$ 1			175,076					175,077
Exercised stock options, shares			26,010
Share-based compensation						5,682,881					5,682,881
Foreign currency translation							3,945,924				3,945,924
Net loss								(15,681,197)			(15,681,197)
Balance at Mar. 31, 2020			$ 1,430			401,488,623	2,151,882	(218,717,149)			184,924,786
Balance, Shares at Mar. 31, 2020			36,817,916
Beginning Balance at Dec. 31, 2019			$ 1,429			395,630,666	(1,794,042)	(203,035,952)			$ 190,802,101
Beginning Balance, Shares at Dec. 31, 2019			36,791,906
Exercised stock options, shares											26,010
Foreign currency translation											$ 4,463,516
Net loss											(41,099,131)
Balance at Jun. 30, 2020			$ 1,451			414,229,672	2,669,474	(244,135,083)			172,765,514
Balance, Shares at Jun. 30, 2020			37,362,416
Beginning Balance at Mar. 31, 2020			$ 1,430			401,488,623	2,151,882	(218,717,149)			184,924,786
Beginning Balance, Shares at Mar. 31, 2020			36,817,916
Share-based compensation						5,056,069					5,056,069
Issuance of shares in connection with asset acquisitions			$ 21			7,684,980					7,685,001
Issuance of shares in connection with asset acquisitions, shares			544,500
Foreign currency translation							517,592				517,592
Net loss								(25,417,934)			(25,417,934)
Balance at Jun. 30, 2020			$ 1,451			$ 414,229,672	$ 2,669,474	$ (244,135,083)			$ 172,765,514
Balance, Shares at Jun. 30, 2020			37,362,416