CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net loss	$ (41,099,131)	$ (38,804,330)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Ordinary shares issued in connection with license agreements		1,966,340
Share-based compensation expense	10,738,950	7,321,114
Foreign currency loss (gain)	1,108,567	(3,001,575)
Depreciation	1,755,739	1,036,283
Lease obligations	142,961	(19,454)
Loss on disposal of equipment, furniture and fixtures	105,716
Gain on termination of lease liability	(143,589)
Amortization of interest on asset retirement obligations	66,385	5,277
Issuance of shares in connection with asset acquisition	7,685,001
Benefit for income taxes		(91,390)
(Increase) decrease in operating assets:
Accounts receivable - related party	(1,136,508)
Prepaid expenses	(3,063,580)	(1,331,780)
Tax incentive receivable	4,628,464
Other current assets	(10,055)	(591,153)
Security deposits	190,839	(245,835)
Increase (decrease) in operating liabilities:
Accounts payable	(704,304)	266,910
Accrued expenses	1,153,994	(2,355,789)
Deferred revenue - related party	(6,683,281)	96,267,249
Net cash (used in) provided by operating activities	(25,263,832)	60,421,867
Cash flows from investing activities:
Purchase of property and equipment	(6,951,980)	(2,206,996)
Net cash used in investing activities	(6,951,980)	(2,206,996)
Cash flows from financing activities:
Payments on lease obligations - financiing leases	(15,881)	(13,365)
Exercise of share options	175,077	1,267
Proceeds from the issuance of ordinary shares		80,000,000
Net cash provided by financing activities	159,196	77,560,949
Net (decrease) increase in cash, cash equivalents and restricted cash	(32,056,616)	135,775,820
Effect of exchange rate changes on cash	(488,963)	417,022
Cash, cash equivalents and restricted cash at beginning of period	227,356,760	68,203,551
Cash, cash equivalents and restricted cash at end of period	194,811,181	204,396,393
Supplemental disclosure of non-cash transactions:
Issuance of shares in connection with asset acquisitions	7,685,001
Issuance of shares in connection with a license agreement		1,966,340
Fixed asset acquisition included in accounts payable and accrued expenses at end of period	161,008	71,473
Lease obligations for right-of-use asset		24,462,830
Supplemental disclosure of cash flow information:
Cash paid for interest	$ 136	991
Ordinary Shares [Member]
Cash flows from financing activities:
Issuance costs in connection with ordinary shares		$ (2,426,953)