UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income (loss)	$ 105,833	$ (95,034)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	11,965	8,582
Purchase accounting adjustments to goodwill	58
Loss on disposal and abandonment of intangible assets	48	130
Loss on disposal and impairment of property and equipment, net	189	43
Gain on strategic investments and marketable securities, net	(103,836)	(40,855)
Stock-based compensation	46,250	227,159
Deferred income taxes	26,050	(6,889)
Unrecognized tax benefits	3,895	47
Bond amortization	301	3,110
Noncash lease expense	3,279	2,650
Provision for expected credit losses	183	62
Change in assets and liabilities:
Accounts and notes receivable and contract assets	(80,247)	(3,988)
Inventory	(47,109)	(1,848)
Prepaid expenses and other assets	(2,688)	(13,320)
Accounts payable, accrued and other liabilities	24,569	(10,381)
Deferred revenue	74,600	25,647
Net cash provided by operating activities	63,340	95,115
Cash flows from investing activities:
Purchases of investments	(108,240)	(238,288)
Proceeds from call / maturity of investments	9,473	294,814
Exercise of warrants of strategic investments	(6,555)
Proceeds from sale of strategic investments		14,546
Purchases of property and equipment	(29,847)	(24,031)
Proceeds from disposal of property and equipment	91	48
Purchases of intangible assets	(104)	(143)
Strategic investments	(61,500)	(20,500)
Business acquisition, net of cash acquired	(2,104)
Net cash provided (used) in investing activities	(198,786)	26,446
Cash flows from financing activities:
Net proceeds from equity offering	(74)
Income and payroll tax payments for net-settled stock awards	(2,319)	(10,312)
Net cash used in financing activities	(2,393)	(10,312)
Effect of exchange rate changes on cash and cash equivalents	(3,910)	(319)
Net increase (decrease) in cash and cash equivalents	(141,749)	110,930
Cash and cash equivalents and restricted cash, beginning of period	356,438	155,551
Cash and cash equivalents and restricted cash, end of period	$ 214,689	$ 266,481