Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities
Net income (loss)	$ 30,713	$ (3,988)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation expense	7,273	189
Depreciation and amortization expense	7	4
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	1,151	(192)
Other assets	(356)
Accounts payable	3,732	(150)
Accrued expenses and other liabilities	6,628	(371)
Deferred revenue	(65,985)
Net cash used in operating activities	(16,837)	(4,508)
Cash flows from financing activities
Proceeds from issuance of common stock for exercise of stock options	471
Payments made for initial public offering costs		(6)
Net cash provided by (used in) financing activities	471	(6)
Net decrease in cash, cash equivalents and restricted cash	(16,366)	(4,514)
Cash, cash equivalents and restricted cash at the beginning of period	850,224	21,768
Cash, cash equivalents and restricted cash at the end of period	833,858	17,254
Cash, cash equivalents and restricted cash at the end of period
Cash and cash equivalents	833,751	17,147
Restricted cash	107	107
Cash, cash equivalents and restricted cash at the end of period	$ 833,858	$ 17,254