Stock-Based Compensation - Schedule of Stock Option Activity (Details) - Class A Common Stock - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2026	Dec. 31, 2025
Stock Options
Beginning balance (in shares)	199,454
Exercised (in shares)	(2,314)
Forfeited and canceled (in shares)	(14,747)
Ending balance (in shares)	182,393	199,454
Outstanding, options exercisable at end of period (in shares)	182,393
Weighted-Average Exercise Price
Weighted-average exercise price (in dollars per share)	$ 65.29
Weighted average exercise price, exercised (in dollars per share)	25.27
Weighted average exercise price, forfeited and canceled (in dollars per share)	124.71
Weighted-average exercise price (in dollars per share)	61.19	$ 65.29
Weighted average exercise price, options exercisable (in dollars per share)	$ 61.19
Weighted-Average Remaining Contractual Life (years)
Weighted average remaining contractual life (years)	5 years 8 months 26 days	6 years 4 months 28 days
Weighted average remaining contractual life (years), options exercisable	5 years 8 months 26 days
Aggregate Intrinsic Value
Outstanding	$ 2,667	$ 14,015
Options exercisable	$ 2,667