v3.26.1
Segment Information - Summary of Revenue, Cost of Goods Sold and Segment Operating Loss (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]              
Revenue $ 49,849   $ 78,024   $ 87,733 $ 156,747  
Cost of Goods Sold 46,585   52,708   80,193 108,619  
Segment Operating Profit (Loss) 3,264   25,316   7,540 48,128  
Corporate expenses 23,138   24,578   47,821 50,329  
Restructuring and demobilization costs 0   4,938   427 14,728  
Impairment of property, plant and equipment     955     287,567 $ 1,000
Loss on property damage 8,910       8,910    
Operating loss (28,784)   (5,155)   (49,618) (304,496)  
Other income (expense), net 6,139   (3,080)   3,029 (3,912)  
Income tax expense (619)   (821)   (366) (1,897)  
Net loss (23,264) $ (23,691) (9,056) $ (301,249) (46,955) (310,305)  
Depreciation expense         9,673 11,589  
Total assets 392,935       392,935   406,679
Construction in Progress [Member]              
Segment Reporting Information [Line Items]              
Impairment of property, plant and equipment       $ 286,600      
Construction in Progress and Held for Sale [Member]              
Segment Reporting Information [Line Items]              
Total assets 44,439       44,439   41,970
All Other Corporate Assets [Member]              
Segment Reporting Information [Line Items]              
Total assets 208,928       208,928   202,048
Operating Segment              
Segment Reporting Information [Line Items]              
Depreciation expense 4,292   5,796   9,673 11,589  
Total assets 139,568       139,568   162,661
Operating Segment | Energy Industrial [Member]              
Segment Reporting Information [Line Items]              
Revenue 20,372   22,793   41,960 52,615  
Cost of Goods Sold 16,491   14,483   34,792 32,615  
Segment Operating Profit (Loss) 3,881   8,310   7,168 20,000  
Depreciation expense 2,091   2,844   4,916 5,710  
Total assets 68,150       68,150   93,111
Operating Segment | Thermal Barrier [Member]              
Segment Reporting Information [Line Items]              
Revenue 29,477   55,231   45,773 104,132  
Cost of Goods Sold 30,094   38,225   45,401 76,004  
Segment Operating Profit (Loss) (617)   17,006   372 28,128  
Depreciation expense 2,201   $ 2,952   4,757 $ 5,879  
Total assets $ 71,418       $ 71,418   $ 69,550