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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT (UNAUDITED) - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Beginning balance, value at Dec. 31, 2018 $ 11,718 $ 70,651,413 $ (74,596,536) $ (3,933,405)
Beginning balance (in shares) at Dec. 31, 2018 11,718,246      
Net income (934,716) (934,716)
Costs related to stock offering (64,371) (64,371)
Common stock issued upon exercise of options
Common stock issued upon exercise of options (in shares) 521      
Stock-based compensation expense $ 18 330,769 330,787
Stock-based compensation expense (in shares) 17,619      
Ending balance, value at Mar. 31, 2019 $ 11,736 70,917,811 (75,531,252) (4,601,705)
Ending balance (in shares) at Mar. 31, 2019 11,736,386      
Beginning balance, value at Dec. 31, 2018 $ 11,718 70,651,413 (74,596,536) (3,933,405)
Beginning balance (in shares) at Dec. 31, 2018 11,718,246      
Net income       (3,070,934)
Ending balance, value at Sep. 30, 2019 $ 11,839 71,225,278 (77,667,470) (6,430,353)
Ending balance (in shares) at Sep. 30, 2019 11,839,065      
Beginning balance, value at Mar. 31, 2019 $ 11,736 70,917,811 (75,531,252) (4,601,705)
Beginning balance (in shares) at Mar. 31, 2019 11,736,386      
Net income (881,167) (881,167)
Costs related to stock offering (55,200) (55,200)
Common stock issued as employee compensation $ 5 32,319 32,324
Common stock issued as employee compensation (in shares) 4,950      
Stock-based compensation expense $ 79 209,488 209,567
Stock-based compensation expense (in shares) 79,054      
Ending balance, value at Jun. 30, 2019 $ 11,820 71,104,418 (76,412,419) (5,296,181)
Ending balance (in shares) at Jun. 30, 2019 11,820,390      
Net income (1,255,051) (1,255,051)
Stock-based compensation expense $ 19 120,860 120,879
Stock-based compensation expense (in shares) 18,675      
Ending balance, value at Sep. 30, 2019 $ 11,839 71,225,278 (77,667,470) (6,430,353)
Ending balance (in shares) at Sep. 30, 2019 11,839,065      
Beginning balance, value at Dec. 31, 2019 $ 11,819 71,294,629 (79,046,688) $ (7,740,240)
Beginning balance (in shares) at Dec. 31, 2019 11,818,830     11,818,830
Net income (2,812,519) $ (2,812,519)
Stock-based compensation expense $ 18 347,167 347,185
Stock-based compensation expense (in shares) 18,388      
Ending balance, value at Mar. 31, 2020 $ 11,837 71,641,796 (81,859,207) (10,205,574)
Ending balance (in shares) at Mar. 31, 2020 11,837,218      
Beginning balance, value at Dec. 31, 2019 $ 11,819 71,294,629 (79,046,688) $ (7,740,240)
Beginning balance (in shares) at Dec. 31, 2019 11,818,830     11,818,830
Net income       $ (2,594,141)
Ending balance, value at Sep. 30, 2020 $ 11,926 71,972,011 (81,640,829) $ (9,656,892)
Ending balance (in shares) at Sep. 30, 2020 11,926,177     11,926,177
Beginning balance, value at Mar. 31, 2020 $ 11,837 71,641,796 (81,859,207) $ (10,205,574)
Beginning balance (in shares) at Mar. 31, 2020 11,837,218      
Net income (596,831) (596,831)
Stock-based compensation expense $ 19 189,184 189,203
Stock-based compensation expense (in shares) 18,388      
Ending balance, value at Jun. 30, 2020 $ 11,856 71,830,980 (82,456,038) (10,613,202)
Ending balance (in shares) at Jun. 30, 2020 11,855,606      
Net income 815,209 815,209
Stock-based compensation expense $ 70 141,031 141,101
Stock-based compensation expense (in shares) 70,571      
Ending balance, value at Sep. 30, 2020 $ 11,926 $ 71,972,011 $ (81,640,829) $ (9,656,892)
Ending balance (in shares) at Sep. 30, 2020 11,926,177     11,926,177