Consolidated Condensed Balance Sheets - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 360.4	$ 464.6
Restricted cash	6.7	6.9
Prepaid expenses	5.4	7.9
Other current assets	2.5	0.8
Total current assets	375.0	480.2
Property and equipment, net	92.9	57.6
Intangible assets, net	0.4	0.4
Right-of-use assets	8.0	8.9
Other long-term assets	7.7	7.2
Total assets	484.0	554.3
Current liabilities
Accounts payable	25.1	14.3
Current portion of lease liabilities	3.3	2.8
Accrued expenses and other current liabilities	55.2	96.9
Total current liabilities	83.6	114.0
Notes payable	32.7	7.2
Lease liabilities, net of current portion	11.5	13.2
Warrant liabilities	9.6	39.9
Other long-term liabilities	12.6	12.9
Total liabilities	150.0	187.2
Commitments and contingencies (Note 7)
Stockholders’ equity
Preferred stock, $0.0000 par value; 10,000 shares authorized; no shares issued and outstanding as of June 30, 2024 and December 31, 2023	0.0	0.0
Additional paid-in capital	1,706.3	1,515.9
Accumulated deficit	(1,372.2)	(1,148.8)
Accumulated other comprehensive loss	(0.1)	0.0
Total stockholders’ equity	334.0	367.1
Total liabilities and stockholders’ equity	484.0	554.3
Class A
Stockholders’ equity
Common stock	0.0	0.0
Class B
Stockholders’ equity
Common stock	$ 0.0	$ 0.0