v3.26.1
Revenue and Segment Information (Details 4) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting Information [Line Items]    
Less: cost of sales $ (2,514) $ (775)
Segment gross profit 1,666 327
Personnel expenses 11,966 3,891
Professional fees 6,210 2,344
Other segment expenses 8,378 2,044
Segment operating loss (24,888) (7,952)
Foreign exchange transaction loss (3,725) (61)
Change in fair value of share liability 0 12
Change in fair value of investments 1,126  
Change in fair value of convertible notes payable (568) (957)
Interest income (expense), net 1,318 426
Loss before income tax expense (benefit) (26,737) (8,532)
Product Revenue [Member]    
Segment Reporting Information [Line Items]    
Sales from external customers/Collaboration revenue 3,980 1,102
Collaboration Revenue [Member]    
Segment Reporting Information [Line Items]    
Sales from external customers/Collaboration revenue 200  
Specialist isotopes and related services [Member]    
Segment Reporting Information [Line Items]    
Less: cost of sales (1,694) (775)
Segment gross profit 1,692 327
Personnel expenses 7,587 3,300
Professional fees 3,482 1,968
Other segment expenses 5,356 1,699
Segment operating loss (14,733) (6,640)
Foreign exchange transaction loss (38) (61)
Change in fair value of share liability   12
Change in fair value of investments 1,126  
Change in fair value of convertible notes payable 89 0
Interest income (expense), net 2,085 251
Loss before income tax expense (benefit) (11,471) (6,438)
Specialist isotopes and related services [Member] | Product Revenue [Member]    
Segment Reporting Information [Line Items]    
Sales from external customers/Collaboration revenue 3,386 1,102
Specialist isotopes and related services [Member] | Collaboration Revenue [Member]    
Segment Reporting Information [Line Items]    
Sales from external customers/Collaboration revenue 0  
Nuclear fuels [Member]    
Segment Reporting Information [Line Items]    
Less: cost of sales 0 0
Segment gross profit 200 0
Personnel expenses 3,248 591
Professional fees 2,197 376
Other segment expenses 911 345
Segment operating loss (6,156) (1,312)
Foreign exchange transaction loss (43) 0
Change in fair value of share liability   0
Change in fair value of investments 0  
Change in fair value of convertible notes payable (657) (957)
Interest income (expense), net 744 175
Loss before income tax expense (benefit) (6,112) (2,094)
Nuclear fuels [Member] | Product Revenue [Member]    
Segment Reporting Information [Line Items]    
Sales from external customers/Collaboration revenue 0 $ 0
Nuclear fuels [Member] | Collaboration Revenue [Member]    
Segment Reporting Information [Line Items]    
Sales from external customers/Collaboration revenue 200  
Helium and LNG [Member]    
Segment Reporting Information [Line Items]    
Less: cost of sales (820)  
Segment gross profit (226)  
Personnel expenses 1,131  
Professional fees 531  
Other segment expenses 2,111  
Segment operating loss (3,999)  
Foreign exchange transaction loss (3,644)  
Change in fair value of investments 0  
Change in fair value of convertible notes payable 0  
Interest income (expense), net (1,511)  
Loss before income tax expense (benefit) (9,154)  
Helium and LNG [Member] | Product Revenue [Member]    
Segment Reporting Information [Line Items]    
Sales from external customers/Collaboration revenue 594  
Helium and LNG [Member] | Collaboration Revenue [Member]    
Segment Reporting Information [Line Items]    
Sales from external customers/Collaboration revenue $ 0