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Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Assets    
Marketable equity securities $ 1,288 $ 1,032
Short-term investments 8,048 8,436
Kinross call options 60  
Level 1    
Assets    
Marketable equity securities 1,288 1,032
Short-term investments 8,048 8,436
Kinross call options 60  
Level 2    
Assets    
Marketable equity securities 0 0
Short-term investments 0 0
Kinross call options 0  
Level 3    
Assets    
Marketable equity securities 0 0
Short-term investments 0 $ 0
Kinross call options $ 0