Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income (loss)	$ 121,190	$ (10,947)	$ (14,034)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Stock-based compensation expense	39,621	7,457	624
Depreciation and amortization expense	29	19	17
Changes in operating assets and liabilities
Unbilled accounts receivable		(5,815)
Prepaid expenses and other current assets	(483)	(7,296)	(43)
Other assets	(161)		0
Accounts payable	10,289	(488)	157
Accrued expenses and other liabilities	43,877	12,437	450
Deferred revenue	(301,367)	301,367
Net cash provided by (used in) operating activities	(87,005)	296,734	(12,829)
Cash flows from investing activities
Additions to property and equipment	(4)	(26)	(2)
Net cash used in investing activities	(4)	(26)	(2)
Cash flows from financing activities
Net proceeds from issuance of convertible preferred stock		214,116
Proceeds from issuance of common stock	1,465	27
Net proceeds from initial public offering of common stock		317,605
Net cash provided by financing activities	1,465	531,748
Net increase (decrease) in cash, cash equivalents and restricted cash	(85,544)	828,456	(12,831)
Cash, cash equivalents and restricted cash at the beginning of period	850,224	21,768	34,599
Cash, cash equivalents and restricted cash at the end of period	764,680	850,224	21,768
Cash, cash equivalents and restricted cash at the end of period
Cash and cash equivalents	764,375	850,117	21,661
Restricted cash	305	107	107
Cash, cash equivalents and restricted cash at the end of period	$ 764,680	850,224	$ 21,768
Supplemental disclosure of non-cash financing activities
Conversion of preferred stock to common stock upon closing of initial public offering		$ 283,230