Capital Structure - Schedule of Common Stock Reserved for Future Issuance (Details) - shares	Sep. 30, 2021	Jun. 04, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	51,049,000
Shares available for future grant under 2021 EIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	11,193,000	16,420,813
Shares issuable upon conversion of Public Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	17,250,000
Shares issuable upon conversion of Private Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	568,000
Shares issuable upon conversion of PIPE Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	300,000
Shares issuable upon conversion of 2026 Notes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	15,023,000
Restricted stock units outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	5,199,000
Stock options outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	1,516,000