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Note 18 - Income Taxes - Components of Income Tax Expense (Benefit) Applicable to Continuing Operations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Current:    
Federal $ 0 $ 0
State 10 3
Foreign 599 616
Total current income tax expense 609 619
Deferred:    
Federal 0 0
State 0 0
Foreign 54 329
Total deferred income tax expense 54 329
Income tax expense, net $ 663 $ 948