Consolidated Condensed Balance Sheets - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 407.6	$ 69.4
Restricted cash	7.2	2.9
Short-term investments	0.0	461.8
Prepaid expenses	6.6	9.8
Other current assets	1.2	1.6
Total current assets	422.6	545.5
Property and equipment, net	42.3	11.5
Intangible assets, net	0.4	0.4
Right-of-use assets	10.1	11.9
Other long-term assets	6.1	4.5
Total assets	481.5	573.8
Current liabilities
Accounts payable	14.6	3.6
Current portion of lease liabilities	3.0	3.7
Notes payable	4.6	9.3
Accrued expenses and other current liabilities	135.5	36.7
Total current liabilities	157.7	53.3
Lease liabilities, net of current portion	13.9	9.2
Warrant liabilities	22.6	7.0
Other long-term liabilities	11.0	11.0
Total liabilities	205.2	80.5
Commitments and contingencies (Note 7)
Stockholders’ equity
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; no shares issued and outstanding as of June 30, 2023 and December 31, 2022	0.0	0.0
Additional paid-in capital	1,264.4	1,185.0
Accumulated deficit	(988.1)	(690.9)
Accumulated other comprehensive loss	0.0	(0.8)
Total stockholders’ equity	276.3	493.3
Total liabilities and stockholders’ equity	481.5	573.8
Common Class A
Stockholders’ equity
Common stock	0.0	0.0
Common Class B
Stockholders’ equity
Common stock	$ 0.0	$ 0.0