CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 356,332	$ 155,440
Marketable securities	72,180
Short-term investments	14,510	406,525
Accounts and notes receivable, net of allowance of $2,203 and $2,105 as of December 31, 2021 and December 31, 2020 respectively	320,819	229,201
Contract assets, net	180,421	63,945
Inventory, net	108,688	89,958
Prepaid expenses and other current assets	56,540	36,883
Total current assets	1,109,490	981,952
Property and equipment, net	138,457	105,494
Deferred tax assets, net	127,193	45,770
Intangible assets, net	15,470	9,448
Goodwill	43,592	25,205
Long-term investments	31,232	90,681
Long-term notes receivable, net	11,256	22,457
Long-term contract assets, net	29,753	20,099
Strategic investments	83,520	11,711
Other long-term assets	98,247	68,206
Total assets	1,688,210	1,381,023
Current liabilities:
Accounts payable	32,220	24,142
Accrued liabilities	103,707	59,843
Current portion of deferred revenue	265,591	163,959
Customer deposits	10,463	2,956
Other current liabilities	6,540	5,431
Total current liabilities	418,521	256,331
Deferred revenue, net of current portion	185,721	111,222
Liability for unrecognized tax benefits	3,797	4,503
Long-term deferred compensation	5,679	4,732
Deferred tax liabilities, net	811	649
Other long-term liabilities	25,832	27,331
Total liabilities	640,361	404,768
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock, $0.00001 par value; 25,000,000 shares authorized; no shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively
Common stock, $0.00001 par value; 200,000,000 shares authorized; 70,896,856 and 63,766,555 shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively	1	1
Additional paid-in capital	1,095,229	962,159
Treasury stock at cost, 20,220,227 shares as of December 31, 2021 and December 31, 2020	(155,947)	(155,947)
Retained earnings	109,883	169,901
Accumulated other comprehensive income (loss)	(1,317)	141
Total stockholders' equity	1,047,849	976,255
Total liabilities and stockholders' equity	$ 1,688,210	$ 1,381,023