Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 327,016	$ 186,964
Restricted cash	3,917	3,915
Short-term investments	181,910	313,969
Accounts receivable, net	182,259	154,574
Inventory	272,455	188,864
Prepaid and other current assets	28,426	30,947
Total current assets	995,983	879,233
Property, plant and equipment, net	1,713	2,016
Long-term investments	14,158	62,469
Operating lease right-of-use asset	7,861	8,054
Other long-term assets	456	432
Intangible asset, net	24,820	13,817
TOTAL ASSETS	1,044,991	966,021
Current Liabilities:
Accounts payable	141,251	105,876
Accrued expenses and other current liabilities	226,545	198,641
Current deferred revenue	2,643	2,926
Total current liabilities	370,439	307,443
Long-Term Liabilities:
Long-term deferred revenue	14,825	15,706
Long-term operating lease liability	8,875	9,153
Other long-term liabilities	5,528	6,214
Total liabilities	399,667	338,516
Commitments and contingencies (Note 5)
Stockholders’ Equity:
Common stock, GBP 0.50 par, unlimited authorized; 402,255,276 shares issued, 395,222,188 shares outstanding as of June 30, 2021; 398,425,000 shares issued, 392,538,081 shares outstanding as of December 31, 2020	292,782	290,115
Additional paid-in capital	1,834,548	1,817,649
Treasury stock; 7,033,088 shares as of June 30, 2021; 5,886,919 shares as of December 31, 2020	(59,011)	(51,082)
Accumulated deficit	(1,422,995)	(1,429,177)
Total stockholders’ equity	645,324	627,505
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,044,991	$ 966,021