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Note 6 - Net Income (Loss) Per Share - Earnings Per Share Reconciliation (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Numerator for basic and diluted income (loss) per share, net income (loss) available to common shareholders $ 205,041 $ (1,940,345) $ 219,874 $ (3,562,615)
Denominator:        
Denominator for basic income (loss) per share, weighted average shares outstanding (in shares) 20,128,429 20,316,572 20,125,440 20,298,573
Effect of dilutive securities (in shares) 6,284,900 0 6,284,900 0
Denominator for diluted earnings per share, adjust weighted average shares and assumed conversion (in shares) 26,413,329 20,316,572 26,410,340 20,298,573
Basic income (loss) per common share (in dollars per share) $ 0.01 $ (0.10) $ 0.01 $ (0.18)
Diluted income (loss) per common share and common share equivalent (in dollars per share) $ 0.01 $ (0.10) $ 0.01 $ (0.18)