v3.26.1
Variable Interest Entities - Schedule of Carrying Amount of Assets and Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2024
Current assets      
Cash and cash equivalents $ 20,355 $ 22,841  
Prepaid expenses 368 216  
Total current assets 20,803 23,110  
Non-current assets      
Property and equipment, net 518 390  
Mineral interests, which includes $2,275 related to SEM 23,379 23,327 $ 0
Other non-current assets 39 42  
Total non-current assets 26,638 25,727  
Total assets 47,441 48,837  
Current liabilities      
Accounts payable 711 1,486  
Accrued expenses 1,111 1,211  
Other current liabilities 55 36  
Total current liabilities 3,103 3,856  
Non-current liabilities      
Other non-current liabilities 958 370  
Total non-current liabilities 32,526 16,518  
Total liabilities 35,629 20,374  
Variable Interest Entity      
Current assets      
Cash and cash equivalents 2,126 10,922  
Prepaid expenses 295 118  
Total current assets 2,421 11,040  
Non-current assets      
Property and equipment, net 469 362  
Mineral interests, which includes $2,275 related to SEM 2,275 2,275  
Other non-current assets 39 42  
Total non-current assets 23,887 23,731  
Total assets 26,308 34,771  
Current liabilities      
Accounts payable 86 362  
Accrued expenses 518 22  
Other current liabilities 53 34  
Total current liabilities 657 418  
Non-current liabilities      
Other non-current liabilities 14 20  
Total non-current liabilities 14 20  
Total liabilities 671 438  
Variable Interest Entity | SEM      
Non-current assets      
Mineral interests, which includes $2,275 related to SEM $ 23,379 $ 23,327