Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 219,454	$ 186,964
Restricted cash	3,918	3,915
Short-term investments	234,674	313,969
Accounts receivable, net	163,653	154,574
Inventory	234,676	188,864
Prepaid and other current assets	22,352	30,947
Total current assets	878,727	879,233
Property, plant and equipment, net	1,425	2,016
Long-term investments	34,996	62,469
Long-term inventory	121,254
Operating lease right-of-use asset	7,660	8,054
Other long-term assets	456	432
Intangible asset, net	23,547	13,817
TOTAL ASSETS	1,068,065	966,021
Current Liabilities:
Accounts payable	114,922	105,876
Accrued expenses and other current liabilities	253,111	198,641
Current deferred revenue	2,649	2,926
Total current liabilities	370,682	307,443
Long-Term Liabilities:
Long-term deferred revenue	14,060	15,706
Long-term operating lease liability	8,576	9,153
Other long-term liabilities	7,648	6,214
Total liabilities	400,966	338,516
Commitments and contingencies (Note 8)
Stockholders’ Equity:
Common stock, 0.50 par, unlimited authorized; 404,084,775 shares issued, 396,598,008 shares outstanding at December 31, 2021; 398,425,000 shares issued, 392,538,081 shares outstanding at December 31, 2020	294,027	290,115
Additional paid-in capital	1,855,246	1,817,649
Treasury stock; 7,486,767 shares at December 31, 2021; 5,886,919 shares at December 31, 2020	(60,726)	(51,082)
Accumulated deficit	(1,421,448)	(1,429,177)
Total stockholders’ equity	667,099	627,505
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,068,065	$ 966,021