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Property, Plant, and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Assets acquired under finance lease	$ 45	$ 349
Total property, plant, and equipment, gross	16,589	172,701
Accumulated depreciation and amortization	(244)	(21,231)
Total property, plant, and equipment, net	16,345	151,470
Finance lease, right-of-use asset, accumulated amortization	1	18
Demonstration Plant
Property, Plant and Equipment [Line Items]
New Carrying Amount	13,739	122,845
Furniture and Equipment
Property, Plant and Equipment [Line Items]
New Carrying Amount	133	1,069
Construction-in-progress
Property, Plant and Equipment [Line Items]
New Carrying Amount	$ 2,672	$ 48,438

X

- Definition

Amount of accumulated amortization of right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Subparagraph (a)
-SubTopic 20
-Topic 842
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-4

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Amount, before accumulated amortization, of right-of-use asset from finance lease.

+ References

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Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

+ References

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Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

+ References

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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