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Note 10 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00% 21.00%
Deferred Tax Assets, Valuation Allowance $ 28,767 $ 17,554  
Operating Loss Carryforwards 230,100    
Deferred Tax Assets, Interest Expenses, Carryforward 18,900    
Unrecognized Tax Benefits 0 0  
Income Tax Examination, Penalties and Interest Accrued 800    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued   $ 0  
Foreign Tax Authority [Member]      
Tax Credit Carryforward, Amount $ 13,000