The number of hydrogen production plant.

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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- Definition

Amount of expense for allocation of cost of tangible asset over its useful life directly used in production of good and rendering of service.

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Amount of interest capitalized during the period.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Property, Plant and Equipment (Details) $ in Thousands	3 Months Ended		9 Months Ended
Property, Plant and Equipment (Details) $ in Thousands	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Plant	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Property, plant and equipment
Property, plant, and equipment	$ 649,825		$ 649,825		$ 284,747
Less: accumulated depreciation	(42,557)		(42,557)		(29,124)
Property, plant, and equipment, net	607,268		607,268		255,623
Capitalized interest	4,000		9,800
Depreciation expense	5,400	$ 1,900	$ 13,500	$ 5,200
Number of hydrogen production plant \| Plant			5
Land
Property, plant and equipment
Property, plant, and equipment	1,165		$ 1,165		1,165
Construction in progress
Property, plant and equipment
Property, plant, and equipment	473,429		473,429		169,415
Leasehold Improvements
Property, plant and equipment
Property, plant, and equipment	18,213		18,213		2,099
Software, machinery and equipment
Property, plant and equipment
Property, plant, and equipment	$ 157,018		$ 157,018		$ 112,068