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Note 15 - Income Taxes (Details Textual) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Income Tax Expense (Benefit), Total $ 143,000 $ (0) $ 143,000 $ (0)
Deferred Income Tax Expense (Benefit)     (13,000) 0
United States, Hong Kong, and Nigeria [Member]        
Income Tax Expense (Benefit), Total $ 0 $ 0 0 $ 0
SPAIN        
Income Tax Expense (Benefit), Total     143,000  
Current Income Tax Expense (Benefit)     156,000  
Deferred Income Tax Expense (Benefit)     $ 13,000