v3.26.3
Fair Value Measurements - Market Risks and Derivative Hedge Contracts (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total investments $ 10,584 $ 11,827
Money market fund (cash equivalent) 15,116  
Total 89,940  
US Treasury Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
U.S. Treasury bills (cash equivalents and short-term investments) 74,824  
Standard Lithium    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total investments 1,464 3,576
Other investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total investments 9,120 8,251
(Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market fund (cash equivalent) 15,116  
(Level 1) | US Treasury Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
U.S. Treasury bills (cash equivalents and short-term investments) 74,824  
(Level 1) | Standard Lithium    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total investments 1,464 3,576
(Level 1) | Other investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total investments 0 0
(Level 3) | Standard Lithium    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total investments 0 0
(Level 3) | Other investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total investments $ 9,120 $ 8,251