CONSOLIDATED AND CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net (loss) income	$ (319,000)	$ 18,000
Adjustments used to reconcile net (loss) income to net cash flows (for) from operating activities:
Depreciation and amortization	85,000	81,000
Equity-based compensation	104,000	75,000
Amortization of discount and issuance costs on convertible notes	2,000	2,000
Loss on impairment	0	12,000
Other non-cash adjustments	4,000	(2,000)
Changes in operating assets and liabilities:
Accounts receivable, net	(45,000)	3,000
Inventories	(11,000)	(8,000)
Prepaid expenses and other current assets	(20,000)	(64,000)
Other assets	0	(2,000)
Accounts payable and other current liabilities	(26,000)	58,000
Other liabilities	0	4,000
Net cash flows (for) from operating activities	(226,000)	177,000
Cash flows for investing activities:
Purchase of short- and long-term investments	(226,000)	(340,000)
Sale and maturities of short- and long-term investments	130,000	193,000
Purchase of property and equipment	(40,000)	(24,000)
Site and software development costs	(65,000)	(41,000)
Net cash flows for investing activities	(201,000)	(212,000)
Cash flows for financing activities:
Repurchase of common stock	(75,000)	0
Net cash flows for financing activities	(75,000)	0
Effect of exchange rate changes on cash and cash equivalents	(4,000)	(8,000)
Net decrease in cash and cash equivalents	(506,000)	(43,000)
Cash and cash equivalents:
Beginning of period	1,706,000	2,129,000
End of period	1,200,000	2,086,000
Supplemental cash flow information:
Cash paid for interest on long-term debt	9,000	11,000
Non-cash impact to equity upon conversion of convertible notes, net of taxes	0	251,000
Purchase of property and equipment included in accounts payable and accrued expenses and in other liabilities	$ 39,000	$ 26,000