Net Loss per Share - Antidilutive Potential Common Shares (Details)		12 Months Ended
	Jul. 28, 2022	Dec. 31, 2024 shares	Dec. 31, 2023 shares	Dec. 31, 2022 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive potential common stock (in shares)		14,067,545	13,576,961	11,824,869
Metromile
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion ratio	0.05263
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive potential common stock (in shares)		9,376,193	9,595,257	9,760,657
Unvested restricted stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive potential common stock (in shares)		4,278,383	3,568,735	1,651,243
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