Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue
Net revenue	$ 188,628	$ 143,922	$ 480,698	$ 340,437
Sales of fuel cell systems
Revenue
Net revenue	75,919	67,032	146,859	152,620
Sale of hydrogen infrastructure
Revenue
Net revenue	37,139	48,967	96,641	109,429
Sale of electrolyzers
Revenue
Net revenue	6,842		14,576
Sales of engineered equipment
Revenue
Net revenue	25,556		76,080
Services performed on fuel cell systems and related infrastructure
Revenue
Net revenue	8,406	6,677	25,468	18,397
Power purchase agreements
Revenue
Net revenue	9,524	9,321	30,730	25,508
Fuel delivered to customers and related equipment
Revenue
Net revenue	12,389	11,556	40,289	33,804
Sale of cryogenic equipment
Revenue
Net revenue	12,529		48,909
Other
Revenue
Net revenue	$ 324	$ 369	$ 1,146	$ 679