Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 191,412	$ 217,666
Restricted cash	523	523
Short-term investments	112,959	91,695
Accounts receivable, net	133,236	130,990
Inventory	225,813	228,732
Prepaid and other current assets	19,878	19,492
Total current assets	683,821	689,098
Property, plant and equipment, net	187	874
Long-term investments	544	1,275
Long-term inventory	143,730	163,620
Operating lease right-of-use asset	9,190	9,074
Other long-term assets	1,638	458
Intangible asset, net	21,078	21,780
TOTAL ASSETS	860,188	886,179
Current Liabilities:
Accounts payable	58,779	64,602
Accrued expenses and other current liabilities	183,264	192,678
Current deferred revenue	2,199	2,199
Total current liabilities	244,242	259,479
Long-Term Liabilities:
Long-term deferred revenue	12,702	13,147
Long-term operating lease liability	9,841	10,015
Other long-term liabilities	8,610	8,205
Total liabilities	275,395	290,846
Commitments and contingencies (Note 5)
Stockholders’ Equity:
Common stock, GBP 0.50 par, unlimited authorized; 416,080,298 shares issued, 407,265,944 shares outstanding as of March 31, 2023 ; 412,333,087 shares issued, 404,346,256 shares outstanding as of December 31, 2022	301,285	299,002
Additional paid-in capital	1,890,496	1,885,352
Treasury stock; 8,814,354 shares as of March 31, 2023; 7,986,831 shares as of December 31, 2022	(63,277)	(61,770)
Accumulated deficit	(1,543,711)	(1,527,251)
Total stockholders’ equity	584,793	595,333
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 860,188	$ 886,179