Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 69.4	$ 746.6
Restricted cash	2.9	0.3
Short-Term Investments:	461.8	0.0
Prepaid expenses	9.8	7.6
Other current assets	1.6	0.3
Total current assets	545.5	754.8
Property and equipment, net	11.5	5.9
Intangible assets, net	0.4	0.5
Right-of-use assets	11.9	4.5
Other long-term assets	4.5	2.7
Total assets	573.8	768.4
Current liabilities
Accounts payable	3.6	3.4
Current portion of lease liabilities	3.7	3.1
Current portion of notes payable	9.3	9.5
Accrued expenses and other current liabilities	36.7	12.3
Total current liabilities	53.3	28.3
Notes payable, net of current portion	0.0	9.3
Lease liabilities, net of current portion	9.2	1.2
Warrant liabilities	7.0	30.3
Other long-term liabilities	11.0	0.4
Total liabilities	80.5	69.5
Commitments and contingencies
Stockholders’ equity
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; no shares issued and outstanding as of December 31, 2022 and 2021	0.0	0.0
Additional paid-in capital	1,185.0	1,072.5
Accumulated deficit	(690.9)	(373.6)
Accumulated other comprehensive loss	(0.8)	0.0
Total stockholders’ equity	493.3	698.9
Total liabilities and stockholders’ equity	573.8	768.4
Common Class A
Stockholders’ equity
Common stock, value, issued	0.0	0.0
Common Class B
Stockholders’ equity
Common stock, value, issued	$ 0.0	$ 0.0