Stockholders’ Equity (Deficit) - Schedule of Common Stock Reserved for Future Issuance (Details) - shares shares in Thousands	Sep. 30, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants outstanding (in shares)	65,434
Stock options outstanding (in shares)	1,953	1,607
Total common stock reserved for future issuance (in shares)	71,409
2023 Amended and Restated Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)	3,298
Total common stock reserved for future issuance (in shares)	3,298
2021 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)	80
Restricted stock units ("RSUs")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding (in shares)	644	338