Consolidated Condensed Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities
Net loss	$ (297,200,000)	$ (130,900,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization and other	2,100,000	1,300,000
Debt discount and issuance cost amortization	300,000	300,000
Stock-based compensation	52,200,000	50,100,000
Change in fair value of warrant liabilities and other warrant costs	15,600,000	(14,500,000)
Gain on issuance of common stock	(3,600,000)	0
Non-cash lease expense	2,500,000	2,100,000
Research and development warrant expense	8,700,000	2,400,000
Other warrant expense	2,100,000	0
Technology and dispute resolution agreements expense	73,000,000.0	0
Accretion and amortization income of short-term investments	(2,300,000)	0
Changes in operating assets and liabilities:
Prepaid expenses	3,200,000	(2,500,000)
Other current assets	400,000	(1,100,000)
Other long-term assets	(1,800,000)	1,500,000
Accounts payable	8,200,000	(1,600,000)
Accrued expenses and other current liabilities	12,800,000	11,500,000
Operating lease right-of-use assets and lease liabilities, net	3,300,000	(1,500,000)
Other long-term liabilities	(300,000)	500,000
Net cash used in operating activities	(120,800,000)	(82,400,000)
Cash flows from investing activities
Proceeds from maturities of short-term investments	465,000,000.0	0
Purchase of property and equipment	(19,500,000)	(2,100,000)
Net cash provided by (used in) investing activities	445,500,000	(2,100,000)
Cash flows from financing activities
Repayment of long-term debt	(5,000,000.0)	(5,000,000.0)
Payments for taxes related to net share settlement of equity awards	(3,500,000)	0
Proceeds from exercise of stock options	0	300,000
Proceeds from shares issued under employee stock purchase plan	1,300,000	0
Proceeds from issuance of common stock	25,000,000.0	0
Net cash provided by (used in) financing activities	17,800,000	(4,700,000)
Net increase (decrease) in cash, cash equivalents, and restricted cash	342,500,000	(89,200,000)
Cash, cash equivalents, and restricted cash, beginning of period	72,300,000	746,900,000
Cash, cash equivalents, and restricted cash, end of period	414,800,000	657,700,000
Supplemental Cash Flow Information:
Cash paid for interest	500,000	800,000
Non-cash investing and financing activities:
Purchases of property and equipment included in accounts payable and accrued expenses	$ 16,200,000	$ 1,600,000