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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss $ 4,425 $ 5,655  
Financing Receivable, Allowance for Credit Loss 800 900  
Accounts Receivable, Credit Loss Expense (Reversal) 4,185 2,244 $ 1,062
Other Employee-related Liabilities, Current 8,900 10,300  
Other Accrued Liabilities, Current $ 3,200 2,700  
Sisecam Wyoming LLC [Member]      
Equity Method Investment, Ownership Percentage 49.00%    
Minimum [Member]      
Lessor, Operating Lease, Term of Contract (Year) 5 years    
Operating Lease Late Payment Recovery Period (Year) 3 years    
Maximum [Member]      
Lessor, Operating Lease, Term of Contract (Year) 40 years    
Operating Lease Late Payment Recovery Period (Year) 5 years    
Accounts Receivable [Member]      
Accounts Receivable, Allowance for Credit Loss $ 4,700 5,400  
Other Current Assets [Member]      
Accounts Receivable, Allowance for Credit Loss $ 0 $ 300