Intangible Assets and Goodwill - Gross Carrying Amount (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Gross carrying amount and accumulated amortization of acquired identifiable intangible assets
Gross Carrying Amount	$ 221,407	$ 165,027
Accumulated Amortization	(17,194)	(6,819)
Total	$ 204,213	158,208
In process research and development
Gross carrying amount and accumulated amortization of acquired identifiable intangible assets
Gross Carrying Amount		29,000
Total		$ 29,000
Acquired technology
Gross carrying amount and accumulated amortization of acquired identifiable intangible assets
Weighted Average Amortization Period	14 years	13 years
Gross Carrying Amount	$ 104,062	$ 45,530
Accumulated Amortization	(8,877)	(5,392)
Total	$ 95,185	$ 40,138
Dry stack electrolyzer technology
Gross carrying amount and accumulated amortization of acquired identifiable intangible assets
Weighted Average Amortization Period	10 years
Gross Carrying Amount	$ 29,000
Accumulated Amortization	(967)
Total	$ 28,033
Customer relationships, Non-compete agreements, Backlog & Trademark
Gross carrying amount and accumulated amortization of acquired identifiable intangible assets
Weighted Average Amortization Period	12 years	12 years
Gross Carrying Amount	$ 88,345	$ 90,497
Accumulated Amortization	(7,350)	(1,427)
Total	$ 80,995	$ 89,070