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Note 7 - Income Taxes - Reconciliation of Differences Between Income Tax Provision Computed and Statutory Rate (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Statutory tax rate 25.80% 25.80% 25.80%
Income tax expense at statutory rate $ 17,920 $ 21,041 $ 2,089
Permanent differences   6,616 9,332
Effect of overseas tax rates   7,158 30,572
Net tax charge related to attributes with full valuation allowance 11,105 (9,247) (7,408)
Exempt dividends from joint ventures   (276) 0
Return to provision adjustments   (4,719) (884)
Withholding taxes   12,545 3,479
Foreign exchange movements on tax balances   3,766 2,908
Movement in uncertain tax positions   6,101 2,958
Others   3,063 1,261
Income tax expense $ 34,653 $ 46,048 $ 44,307
Effective tax rate 49.90% 56.50% 547.40%
Changes in uncertain tax benefits $ 4,628    
Changes in uncertain tax benefits, percent 6.70%    
Changes in valuation allowances, percent 16.00%    
Other $ 1,293    
Other, percent 1.90%    
Changes in Valuation allowance $ (11,105) $ 9,247 $ 7,408
Disallowed provisions $ 3,972    
Disallowed provisions, percent 5.70%    
Other $ 6,525    
Other, percent 9.40%    
Income tax rate, percent 49.90% 56.50% 547.40%
AUSTRALIA      
Net tax charge related to attributes with full valuation allowance $ (4,645)    
Changes in valuation allowances, percent (6.70%)    
Other $ 43    
Other, percent 0.10%    
Changes in Valuation allowance $ 4,645    
ARGENTINA      
Other $ 2,918    
Other, percent 4.20%    
BRAZIL      
Net tax charge related to attributes with full valuation allowance $ 4,839    
Changes in valuation allowances, percent 7.00%    
Other $ 744    
Other, percent 1.10%    
Changes in Valuation allowance $ (4,839)    
GUYANA      
Other $ 4,206    
Other, percent 6.10%    
NORWAY      
Other $ 3,968    
Other, percent 5.70%    
UNITED STATES      
Net tax charge related to attributes with full valuation allowance $ 26,291    
Changes in valuation allowances, percent (37.80%)    
Other $ 4,781    
Other, percent 6.90%    
Changes in Valuation allowance $ (26,291)    
Effect of rates different than statutory $ (4,188)    
Effect of rates different than statutory, percent (6.00%)    
Other Geographical Areas [Member]      
Other $ 2,835    
Other, percent 4.10%