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Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($)
Common Stock
Treasury Stock
Additional Paid-in Capital
Retained Earnings (Accumulated Deficit)
Total
Balance at Dec. 31, 2018 $ 6,869 $ 19,867,259 $ (4,720,291) $ 15,153,837
Balance, shares at Dec. 31, 2018 6,868,679      
Stock-based compensation expense for restricted stock awards and stock options 452,525 452,525
Issuance of common stock for consulting services $ 6 34,494 34,500
Issuance of common stock for consulting services, shares 6,000      
Net income (loss) 646,615 646,615
Balance at Mar. 31, 2019 $ 6,875 20,354,278 (4,073,676) 16,287,477
Balance, shares at Mar. 31, 2019 6,874,679      
Stock-based compensation expense for restricted stock awards and stock options 443,661 443,661
Net income (loss) 443,384 443,384
Balance at Jun. 30, 2019 $ 6,875 20,797,939 (3,630,292) 17,174,522
Balance, shares at Jun. 30, 2019 6,874,679      
Balance at Dec. 31, 2019 $ 6,879 $ (2,015) $ 21,281,382 $ (13,100,351) $ 8,185,895
Balance, shares at Dec. 31, 2019 6,878,904 (1,900)      
Stock-based compensation expense 89,206 89,206
Repurchases of common stock $ (7,240) $ (7,240)
Repurchases of common stock, shares (6,600)      
Net income (loss) (438,384) (438,384)
Balance at Mar. 31, 2020 $ 6,879 $ (9,255) $ 21,370,588 $ (13,538,735) $ 7,829,477
Balance, shares at Mar. 31, 2020 6,878,904 (8,500)      
Stock-based compensation expense 57,183 57,183
Repurchases of common stock $ (1,604) $ (1,604)
Repurchases of common stock, shares (1,450)      
Net income (loss) 531,541 531,541
Balance at Jun. 30, 2020 $ 6,879 $ (10,859) $ 21,427,771 $ (13,007,194) $ 8,416,597
Balance, shares at Jun. 30, 2020 6,878,904 (9,950)