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Net Income Per Share of Common Stock
9 Months Ended
Sep. 30, 2021
Earnings Per Share [Abstract]  
Net Income Per Share of Common Stock [Text Block]

Note 8 - Net Income Per Share of Common Stock

Basic net income per common share is computed using the weighted-average number of common shares outstanding during the period. Diluted net income per share is computed using the weighted-average number of common stock shares and dilutive potential common shares outstanding during the period. For the nine months ended September 30, 2021, the Company had 800,035 potential common shares, consisting of 120,000 preferred shares, and options to purchase 680,035 shares, outstanding that were dilutive.