UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ 54,871	$ (47,917)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	5,755	4,291
Loss on disposal and abandonment of intangible assets	40	11
Loss on disposal and impairment of property and equipment, net	106	45
Net unrealized gain on strategic investments and marketable securities	(55,851)
Stock-based compensation	25,088	89,610
Deferred income taxes	18,029	(598)
Unrecognized tax benefits	1,365	194
Bond amortization	159	1,504
Noncash lease expense	1,556	1,111
Provision for expected credit losses	228	(335)
Change in assets and liabilities:
Accounts and notes receivable and contract assets	7,495	31,298
Inventory	(14,260)	520
Prepaid expenses and other assets	(7,074)	(6,952)
Accounts payable, accrued and other liabilities	(9,580)	(18,062)
Deferred revenue	16,037	6,219
Net cash provided by operating activities	43,964	60,939
Cash flows from investing activities:
Purchases of investments		(155,825)
Proceeds from call / maturity of investments	7,200	132,254
Purchases of property and equipment	(17,098)	(10,521)
Proceeds from disposal of property and equipment	87	10
Purchases of intangible assets	(37)	(41)
Strategic investments	(500)	(20,000)
Net cash used in investing activities	(10,348)	(54,123)
Cash flows from financing activities:
Net proceeds from equity offering	(71)
Income and payroll tax payments for net-settled stock awards	(1,388)	(7,045)
Net cash used in financing activities	(1,459)	(7,045)
Effect of exchange rate changes on cash and cash equivalents	(157)	(392)
Net increase (decrease) in cash and cash equivalents	32,000	(621)
Cash and cash equivalents and restricted cash, beginning of period	356,438	155,551
Cash and cash equivalents and restricted cash, end of period	$ 388,438	$ 154,930