CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (15,681,197)	$ (17,981,918)
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	5,682,881	2,934,991
Foreign currency loss (gain)	756,701	(2,718,400)
Depreciation	815,423	499,641
Lease obligation	47,780
Loss on disposal of equipment, furniture and fixtures	7,550
Gain on termination of lease liability	(143,589)
Amortization of interest on asset retirement obligations	33,062	2,639
(Increase) decrease in operating assets:
Accounts receivable - related party	(4,705,613)
Prepaid expenses	827,980	188,044
Tax incentive receivable	4,628,464
Other current assets	(98,803)	2,523,388
Security deposits	190,839	130,949
Increase (decrease) in operating liabilities:
Accounts payable	3,944,220	304,716
Accrued expenses	(4,479,397)	(4,124,797)
Other current liabilities		(252,322)
Deferred revenue - related party	(4,209,576)	98,692,719
Net cash (used in) provided by operating activities	(12,383,275)	82,165,990
Cash flows from investing activities:
Purchase of property and equipment	(4,035,968)	(1,115,233)
Net cash used in investing activities	(4,035,968)	(1,115,233)
Cash flows from financing activities:
Payments on finance lease obligations - financing leases	(10,266)	(6,624)
Exercise of share options	175,077
Proceeds from the sale of ordinary shares		80,000,000
Issuance costs in connection with ordinary shares		(2,426,953)
Net cash provided by financing activities	164,811	77,566,423
Net (decrease) increase in cash, cash equivalents and restricted cash	(16,254,432)	158,617,180
Effect of exchange rate changes on cash	(315,080)	577,784
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	210,787,248	227,398,515
Supplemental disclosure of non-cash transactions:
Fixed asset acquisition included in accounts payable and accrued expenses at end of period	2,505,098	236,535
Lease obligations for right-of-use asset		10,930,367
Supplemental disclosure of cash flow information:
Cash paid for interest	$ 122	553
Ordinary Shares [Member]
Cash flows from financing activities:
Issuance costs in connection with ordinary shares		$ (2,426,953)