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Net Loss per Share - Antidilutive Potential Common Shares (Details) | 12 Months Ended
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Dec. 31, 2025 shares | Dec. 31, 2024 shares | Dec. 31, 2023 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Antidilutive potential common stock (in shares) | 10,862,892 | 14,067,545 | 13,576,961
Metromile |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Conversion ratio | 0.05263 | 0.05263 | 0.05263
Options to purchase common stock |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Antidilutive potential common stock (in shares) | 7,253,851 | 9,376,193 | 9,595,257
Unvested restricted stock |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Antidilutive potential common stock (in shares) | 3,196,072 | 4,278,383 | 3,568,735
Warrants for common stock |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Antidilutive potential common stock (in shares) | 412,969 | 412,969 | 412,969

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