Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 217,666	$ 219,454
Restricted cash	523	3,918
Short-term investments	91,695	234,674
Accounts receivable, net	130,990	163,653
Inventory	228,732	234,676
Prepaid and other current assets	19,492	22,352
Total current assets	689,098	878,727
Property, plant and equipment, net	874	1,425
Long-term investments	1,275	34,996
Long-term inventory	163,620	121,254
Operating lease right-of-use asset	9,074	7,660
Other long-term assets	458	456
Intangible asset, net	21,780	23,547
TOTAL ASSETS	886,179	1,068,065
Current Liabilities:
Accounts payable	64,602	114,922
Accrued expenses and other current liabilities	192,678	253,111
Current deferred revenue	2,199	2,649
Total current liabilities	259,479	370,682
Long-Term Liabilities:
Long-term deferred revenue	13,147	14,060
Long-term operating lease liability	10,015	8,576
Other long-term liabilities	8,205	7,648
Total liabilities	290,846	400,966
Commitments and contingencies (Note 7)
Stockholders’ Equity:
Common stock, GBP 0.50 par, unlimited authorized; 412,333,087 shares issued, 404,346,256 shares outstanding at December 31, 2022; 404,084,775 shares issued, 396,598,008 shares outstanding at December 31, 2021	299,002	294,027
Additional paid-in capital	1,885,352	1,855,246
Treasury stock; 7,986,831 shares at December 31, 2022; 7,486,767 shares at December 31, 2021	(61,770)	(60,726)
Accumulated deficit	(1,527,251)	(1,421,448)
Total stockholders’ equity	595,333	667,099
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 886,179	$ 1,068,065