Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue
Net revenue	$ 891,340	$ 701,440	$ 502,342
Sales of fuel cell systems
Revenue
Net revenue	181,168	207,691	225,229
Sale of hydrogen infrastructure
Revenue
Net revenue	183,606	141,528	135,055
Sale of electrolyzers
Revenue
Net revenue	82,611	28,463	16,667
Sales of engineered equipment
Revenue
Net revenue	32,361	93,489	7,571
Services performed on fuel cell systems and related infrastructure
Revenue
Net revenue	39,093	35,280	26,706
Power purchase agreements
Revenue
Net revenue	63,731	47,183	35,153
Fuel delivered to customers and related equipment
Revenue
Net revenue	66,246	57,196	46,917
Sales of cryogenic equipment and other
Revenue
Net revenue	231,687	87,761	8,255
Other
Revenue
Net revenue	$ 10,837	$ 2,849	$ 789