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Note 11 - Income Taxes (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Jan. 01, 2018
Dec. 31, 2017
Operating Loss Carryforwards [Line Items]        
Increase of valuation allowance $ 3,500,000 $ 2,300,000    
Uncertain income tax positions 0 $ 0    
Federal [Member]        
Operating Loss Carryforwards [Line Items]        
Operating loss carry forwards 109,400,000   $ 31,700,000 $ 77,800,000
State [Member]        
Operating Loss Carryforwards [Line Items]        
Operating loss carry forwards $ 63,000,000