CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ (60,018)	$ (1,724)	$ 882
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	18,694	12,475	11,361
Loss on disposal and abandonment of intangible assets	146	320	67
Loss on disposal and impairment of property and equipment, net	92	1,722	2,542
Net gain on strategic investments and marketable securities	(23,035)
Stock-based compensation expense	303,331	133,572	78,495
Deferred income taxes	(81,303)	(16,528)	(7,987)
Unrecognized tax benefits	(706)	671	983
Bond amortization	5,217	3,345	361
Noncash lease expense	5,573	4,104	3,567
Provision for expected credit losses	(214)	1,302
Change in assets and liabilities:
Accounts and notes receivable and contract assets	(205,769)	(107,762)	(38,830)
Inventory	(18,272)	(52,156)	(4,903)
Prepaid expenses and other assets	(40,158)	(14,885)	(9,845)
Accounts payable, accrued and other liabilities	45,301	8,886	4,967
Deferred revenue	175,615	65,139	24,013
Net cash provided by operating activities	124,494	38,481	65,673
Cash flows from investing activities:
Purchases of investments and marketable securities	(362,479)	(656,522)	(354,477)
Proceeds from call, maturity, or sale of investments	718,617	379,839	130,083
Proceeds from strategic investments	14,546
Purchases of property and equipment	(49,886)	(72,629)	(15,939)
Proceeds from disposal of property and equipment	43	95
Purchases of intangible assets	(392)	(241)	(404)
Purchases of strategic investments	(45,500)	(7,068)
Business acquisition, net of cash acquired	(22,393)
Net cash provided by (used in) investing activities	252,556	(356,526)	(240,737)
Cash flows from financing activities:
Net proceeds from equity offering	105,514	306,779
Proceeds from options exercised	51,614	295	114
Income and payroll tax payments for net-settled stock awards	(331,309)	(7,809)	(4,051)
Net cash provided by (used in) financing activities	(174,181)	299,265	(3,937)
Effect of exchange rate changes on cash and cash equivalents	(1,982)	1,976	329
Net increase (decrease) in cash and cash equivalents	200,887	(16,804)	(178,672)
Cash and cash equivalents and restricted cash, beginning of period	155,551	172,355	351,027
Cash and cash equivalents and restricted cash, end of period	$ 356,438	$ 155,551	$ 172,355