Quarterly report pursuant to Section 13 or 15(d)

STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited)

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STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Total
Balance beginning at Dec. 31, 2018 $ 409,329 $ 4,595,214 $ 4,300,468 $ (344,204) $ 8,960,807
Balance beginning (in shares) at Dec. 31, 2018 40,932,911        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of stock-based compensation $ 89 176,161 176,250
Issuance of stock-based compensation (in shares) 8,914        
Compensation expense related to stock options   121,875 121,875
Repurchase of shares $ (20) (2,800) (2,820)
Repurchase of shares (in shares) (2,000)        
Net income (loss)     (85,390) (85,390)
Balance ending at Mar. 31, 2019 $ 409,398 4,890,450 4,215,078 (344,204) 9,170,722
Balance ending (in shares) at Mar. 31, 2019 40,939,825        
Balance beginning at Dec. 31, 2018 $ 409,329 4,595,214 4,300,468 (344,204) 8,960,807
Balance beginning (in shares) at Dec. 31, 2018 40,932,911        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss)         644,606
Balance ending at Sep. 30, 2019 $ 422,286 5,985,636 4,945,074 (344,204) 11,008,792
Balance ending (in shares) at Sep. 30, 2019 42,228,658        
Balance beginning at Mar. 31, 2019 $ 409,398 4,890,450 4,215,078 (344,204) 9,170,722
Balance beginning (in shares) at Mar. 31, 2019 40,939,825        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of stock-based compensation $ 1,164 35,484 36,648
Issuance of stock-based compensation (in shares) 116,386        
Compensation expense related to stock options   194,765 194,765
Issuance upon options exercised $ 650 24,050 24,700
Issuance upon options exercised (in shares) 65,000        
Net income (loss)     78,183 78,183
Balance ending at Jun. 30, 2019 $ 411,212 5,144,749 4,293,261 (344,204) 9,505,018
Balance ending (in shares) at Jun. 30, 2019 41,121,211        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of stock-based compensation $ 124 43,502 43,626
Issuance of stock-based compensation (in shares) 12,447        
Compensation expense related to stock options   324,135 324,135
Issuance of warrants exercised $ 10,000 440,000 450,000
Issuance of warrants exercised (in shares) 1,000,000        
Issuance upon options exercised $ 950 33,250 34,200
Issuance upon options exercised (in shares) 95,000        
Net income (loss)     651,813 651,813
Balance ending at Sep. 30, 2019 $ 422,286 5,985,636 4,945,074 (344,204) 11,008,792
Balance ending (in shares) at Sep. 30, 2019 42,228,658        
Balance beginning at Dec. 31, 2019 $ 422,398 6,293,069 4,864,817 (344,204) 11,236,080
Balance beginning (in shares) at Dec. 31, 2019 42,239,788        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of stock-based compensation $ 92 59,910 60,002
Issuance of stock-based compensation (in shares) 9,189        
Compensation expense related to stock options   300,966     300,966
Repurchase of shares        
Issuance upon options exercised $ 1,750 83,750 85,500
Issuance upon options exercised (in shares) 175,000        
Net income (loss)     449,428 449,428
Balance ending at Mar. 31, 2020 $ 424,240 6,737,695 5,314,245 (344,204) 12,131,976
Balance ending (in shares) at Mar. 31, 2020 42,423,977        
Balance beginning at Dec. 31, 2019 $ 422,398 6,293,069 4,864,817 (344,204) 11,236,080
Balance beginning (in shares) at Dec. 31, 2019 42,239,788        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss)         (377,435)
Balance ending at Sep. 30, 2020 $ 466,718 35,331,483 4,487,382 (344,204) 39,941,379
Balance ending (in shares) at Sep. 30, 2020 46,671,807        
Balance beginning at Mar. 31, 2020 $ 424,240 6,737,695 5,314,245 (344,204) 12,131,976
Balance beginning (in shares) at Mar. 31, 2020 42,423,977        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of stock-based compensation $ 80 59,922 60,002
Issuance of stock-based compensation (in shares) 7,999        
Compensation expense related to stock options   363,851 363,851
Litigation settlement options   347,008 347,008
Litigation settlement share issuance $ 952 937,142 938,094
Litigation settlement share issuance (in shares) 95,238        
Issuance upon options exercised $ 5,192 5,189 10,381
Issuance upon options exercised (in shares) 519,156        
Capital raise $ 35,937 26,436,043 26,471,980
Capital raise (in shares) 3,593,750        
Net income (loss)     (1,076,038) (1,076,038)
Balance ending at Jun. 30, 2020 $ 466,401 34,886,850 4,238,207 (344,204) 39,247,254
Balance ending (in shares) at Jun. 30, 2020 46,640,120        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of stock-based compensation $ 67 59,935 60,002
Issuance of stock-based compensation (in shares) 6,681        
Compensation expense related to stock options   346,323 346,323
Issuance upon options exercised $ 250 (250)
Issuance upon options exercised (in shares) 25,006        
Capital raise   38,625 38,625
Net income (loss)     249,175 249,175
Balance ending at Sep. 30, 2020 $ 466,718 $ 35,331,483 $ 4,487,382 $ (344,204) $ 39,941,379
Balance ending (in shares) at Sep. 30, 2020 46,671,807