CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities:
Net loss	$ (222,719)	$ (25,864)
Reconciliation of net loss to net cash used in operating activities:
Depreciation and amortization	2,317	925
Non-cash stock-based compensation	53,060	3,965
Right-of-use assets expensed	951	0
Other	6,362	356
Changes in operating assets and liabilities:
Receivables, prepaid expenses and other assets	220,205	4,521
Accounts payable and accrued expenses	53,325	(8,450)
Deferred revenue	549,584	1,437
Net cash provided by (used in) operating activities	663,085	(23,110)
Investing Activities:
Capital expenditures	(13,781)	(122)
Purchases of marketable securities	(2,167)	(57,606)
Proceeds from maturities and sale of marketable securities	157,557	0
Net cash provided by (used in) investing activities	141,609	(57,728)
Financing Activities:
Net proceeds from sales of common stock	564,859	185,918
Proceeds from the exercise of stock-based awards	26,750	5
Treasury stock related to tax withholding on stock-based awards	(2,651)	0
Finance lease payments	(11,971)	0
Net cash provided by financing activities	576,987	185,923
Effect of exchange rate on cash, cash equivalents and restricted cash	(1,349)	(73)
Net increase in cash, cash equivalents and restricted cash	1,380,332	105,012
Cash, cash equivalents and restricted cash at beginning of period	648,738	82,180
Cash, cash equivalents and restricted cash at end of period	2,029,070	187,192
Supplemental disclosure of non-cash activities:
Capital expenditures included in accounts payable and accrued expenses	9,076	125
Right-of-use assets from new lease agreements	9,770	0
Supplemental disclosure of cash flow information:
Cash interest payments	7,530	6,094
Cash paid for income taxes	$ 3,017	$ 0