Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net loss	$ (279,033)	$ (147,140)
Adjustments to reconcile net loss including noncontrolling interests to net cash provided by operations:
Depreciation and amortization	34,410	18,852
Stock-based compensation expense	132,403	49,666
Change in fair value of warrants	0	1,890
Operating lease non-cash expense	20,544
Other non-cash charges/(credits)	16	1,721
Changes in operating assets and liabilities:
Accounts receivable	29,960	(84,119)
Accounts payable	2,313	(988)
Prepaid expenses and other current assets	(27,264)	(6,835)
Other assets	(6,476)	1,392
Developer exchange liability	9,703	25,155
Accrued expenses and other current liabilities	74,129	9,834
Other long-term liability	584	1,836
Operating lease liabilities	(12,642)	0
Deferred revenue	484,936	384,303
Deferred cost of revenue	(107,863)	(95,442)
Net cash provided by operating activities	355,720	160,125
Cash flows from investing activities:
Acquisition of property and equipment	(45,368)	(26,249)
Purchases of short-term investments	0	(5,991)
Maturities of short-term investments	0	36,000
Purchases of intangible assets	(256)	(579)
Net cash (used in)/provided by investing activities	(45,624)	3,181
Cash flows from financing activities:
Proceeds from issuance of preferred stock for warrant exercises	0	147
Proceeds from issuance of common stock	41,889	5,996
Net proceeds from issuance of preferred stock	534,286	149,669
Net cash provided by financing activities	576,175	155,812
Effect of exchange rate changes on cash and cash equivalents	48	(3)
Net increase in cash and cash equivalents	886,319	319,115
Cash and cash equivalents
Beginning balance	893,943	301,493
Ending balance	1,780,262	620,608
Supplemental disclosure of cash flow information:
Cash paid for interest	0	0
Cash paid for income taxes	0	0
Supplemental disclosure of noncash investing and financing activities:
Property and equipment additions in accounts payable and accrued expenses	10,820	16,343
Conversion of convertible preferred stock to common stock upon direct listing	$ 879,113	$ 0