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Property, Plant, and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Property, Plant and Equipment [Line Items]    
Assets acquired under finance lease $ 349 $ 349
Total property, plant, and equipment, gross 127,200 172,701
Accumulated depreciation and amortization (30,605) (21,231)
Total property, plant, and equipment, net 96,595 151,470
Finance lease, right-of-use asset, accumulated amortization 45 18
Demonstration Plant    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 122,352 122,845
Furniture and Equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 1,173 1,069
Construction-in-progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 3,326 $ 48,438