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Statements of Stockholders' Equity (Unaudited) - USD ($)
Common Stock
Additional paid-in capital
Retained Earnings (Accumulated Deficit)
Treasury Stock
Accumulated Other Comprehensive (Loss) Income
Total
Balance at Dec. 31, 2017 $ 566,265 $ 22,458,219 $ 978,973 $ (407,879) $ (638) $ 23,594,940
Balance, Shares at Dec. 31, 2017 5,662,645     186,448    
Net income (221,122) (221,123)
Other comprehensive loss, net of taxes 43,859 43,859
Exercise of stock options (4,507) $ 8,662 4,155
Exercise of stock options, Shares       (3,960)    
Stock-based compensation 71,048 71,048
Balance at Mar. 31, 2018 $ 566,265 22,524,760 757,851 $ (399,217) 43,221 23,492,880
Balance, Shares at Mar. 31, 2018 5,662,645     182,488    
Balance at Dec. 31, 2018 $ 566,265 22,695,557 (1,342,698) $ (204,947) 30,157 21,744,334
Balance, Shares at Dec. 31, 2018 5,662,645     93,683    
Net income 144,555 144,555
Other comprehensive loss, net of taxes (27,069) (27,069)
Public offering of common stock, net of $696,566 of offering costs $ 163,636 8,139,800 8,303,436
Public offering of common stock, net of $696,566 of offering costs, Shares 1,636,364          
Exercise of stock options (9,337) $ 9,339 2
Exercise of stock options, Shares       (4,269)    
Stock-based compensation 82,835 82,835
Balance at Mar. 31, 2019 $ 729,901 $ 30,908,855 $ (1,198,143) $ (195,608) $ 3,088 $ 30,248,093
Balance, Shares at Mar. 31, 2019 7,299,009     89,414