Quarterly report pursuant to Section 13 or 15(d)

Offerings of Common Stock and Warrants and At-the-Market Offering Program - Stock to Vendors (Details)

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Offerings of Common Stock and Warrants and At-the-Market Offering Program - Stock to Vendors (Details) - Andretti Autosport 6, Inc.
$ in Millions
3 Months Ended 9 Months Ended
Feb. 10, 2020
USD ($)
installment
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Offerings of Common Stock and Warrants and At-the-Market Offering Program      
Sponsorship agreement, sponsorship fee $ 1.3    
Sponsorship agreement, sponsorship fee payable $ 0.7    
Sponsorship agreement, sponsorship fee payable, installments, number | installment 4    
Value of stock issued $ 0.6    
Sponsorship agreement, sponsorship fee, prepaid marketing credit   $ 0.2 $ 0.2
Sponsorship agreement, sponsorship fee, cash paid, cumulative   0.4 0.4
Shares issued (in shares) | shares 229,886    
Sponsorship agreement, sponsorship fee, amortization of prepaid marketing credit   $ 0.2 $ 1.1