v3.25.4
Note 11 - Income Tax (Details Textual) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Statement Line Items [Line Items]    
Deferred tax asset, estimated unused tax losses carryforward $ 200,800 $ 172,900
Unused tax losses for which no deferred tax asset recognised 0  
Unused tax credits [member]    
Statement Line Items [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 197,000 172,400
Unused tax credits [member] | GIBRALTAR    
Statement Line Items [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 155,800 140,800
Unused tax credits [member] | UNITED KINGDOM    
Statement Line Items [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 17,300 13,500
Unused tax credits [member] | UNITED STATES | Federal [member]    
Statement Line Items [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 18,200 11,600
Unused tax credits [member] | UNITED STATES | States [member]    
Statement Line Items [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised $ 9,000 $ 6,500