v3.26.1
Nature of Operations and Organization (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
MWd
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
MWd
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]              
Powerhouse production capability, nuclear fuel | MWd 15       15    
Powerhouse production capability, fresh fuel | MWd 75       75    
Powerhouse useful life 30 years       30 years    
Cash, cash equivalents, and marketable securities $ 3,006,289       $ 3,006,289    
Net loss 48,536 $ 33,065 $ 24,685 $ 9,810 81,601 $ 34,495  
Operating loss 73,190   $ 28,015   124,166 45,889  
Net cash used in operating activities         65,459 $ 30,714  
Accumulated deficit $ 322,373       $ 322,373   $ 240,772