Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Investments	$ 22,754	$ 17,354
CarbonFree Convertible Notes
Derivatives, Fair Value [Line Items]
Investments			$ 5,000
KMX Convertible Notes
Derivatives, Fair Value [Line Items]
Investments		$ 400
KMX Preferred Units
Derivatives, Fair Value [Line Items]
Investments	$ 1,000