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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue from Contracts with Customers
Total revenue	$ 106,137	$ 104,876	$ 312,514	$ 306,539
Contra revenue charge			51,510	42,742
Fuel Sales
Revenue from Contracts with Customers
Total revenue	69,860	64,116	214,035	189,717
RIN Credits
Revenue from Contracts with Customers
Total revenue	8,329	11,066	22,729	29,401
LCFS Credits
Revenue from Contracts with Customers
Total revenue	3,148	1,924	9,650	6,079
AFTC
Revenue from Contracts with Customers
Total revenue	0	6,390	(28)	17,750
Total volume-related product revenue
Revenue from Contracts with Customers
Total revenue	81,018	82,080	244,966	243,214
Station construction sales
Revenue from Contracts with Customers
Total revenue	9,877	7,820	23,331	19,060
Total product revenue
Revenue from Contracts with Customers
Total revenue	90,895	89,900	268,297	262,274
Volume-related, O&M services
Revenue from Contracts with Customers
Total revenue	14,601	14,406	42,243	42,563
Other services
Revenue from Contracts with Customers
Total revenue	641	570	1,974	1,702
Total service revenue
Revenue from Contracts with Customers
Total revenue	15,242	14,976	44,217	44,265
Volume -Related
Revenue from Contracts with Customers
Gain (loss) due to changes in fair value	(319)	(1,416)	(1,420)	267
Contra revenue charge	$ 16,800	$ 15,800	$ 51,500	$ 42,700

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