Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue
Net revenue	$ 502,342	$ (93,237)	$ 229,975
Sales of fuel cell systems
Revenue
Net revenue	225,229	(55,091)	130,757
Sale of hydrogen infrastructure
Revenue
Net revenue	135,055	(43,391)	19,163
Sale of electrolyzers
Revenue
Net revenue	16,667	4,187
Sale of solutions
Revenue
Net revenue	7,571
Services performed on fuel cell systems and related infrastructure
Revenue
Net revenue	26,706	(9,801)	25,217
Power Purchase Agreements
Revenue
Net revenue	35,153	26,620	25,553
Fuel delivered to customers
Revenue
Net revenue	46,917	(16,072)	29,099
Sale of cryogenic equipment
Revenue
Net revenue	8,255
Other
Revenue
Net revenue	$ 789	$ 311	$ 186