Net Loss per Share - Antidilutive Potential Common Shares (Details)	3 Months Ended
	Mar. 31, 2025 shares	Mar. 31, 2024 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive potential common stock (in shares)	13,691,057	13,872,075
Metromile
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion ratio	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)	9,260,114	9,519,491
Unvested restricted stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive potential common stock (in shares)	4,017,974	3,939,615
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