Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 219,151	$ 219,454
Restricted cash	3,918	3,918
Short-term investments	143,406	234,674
Accounts receivable, net	110,234	163,653
Inventory	267,818	234,676
Prepaid and other current assets	28,092	22,352
Total current assets	772,619	878,727
Property, plant and equipment, net	1,281	1,425
Long-term investments	26,701	34,996
Long-term inventory	141,052	121,254
Operating lease right-of-use asset	8,689	7,660
Other long-term assets	456	456
Intangible asset, net	22,911	23,547
TOTAL ASSETS	973,709	1,068,065
Current Liabilities:
Accounts payable	90,753	114,922
Accrued expenses and other current liabilities	207,622	253,111
Current deferred revenue	2,198	2,649
Total current liabilities	300,573	370,682
Long-Term Liabilities:
Long-term deferred revenue	14,139	14,060
Long-term operating lease liability	10,398	8,576
Other long-term liabilities	7,490	7,648
Total liabilities	332,600	400,966
Commitments and contingencies (Note 5)
Stockholders’ Equity:
Common stock, GBP 0.50 par, unlimited authorized; 404,588,758 shares issued, 396,940,908 shares outstanding as of March 31, 2022; 404,084,775 shares issued, 396,598,008 shares outstanding as of December 31, 2021	294,364	294,027
Additional paid-in capital	1,861,017	1,855,246
Treasury stock; 7,647,850 shares as of March 31, 2022; 7,486,767 shares as of December 31, 2021	(61,261)	(60,726)
Accumulated deficit	(1,453,011)	(1,421,448)
Total stockholders’ equity	641,109	667,099
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 973,709	$ 1,068,065