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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2019 $ 61,644,052 $ 15,373 $ 160,858,072 $ (99,229,393)
Beginning Balance, Shares at Dec. 31, 2019   15,372,905    
Stock-based compensation 377,317   377,317  
Net income (loss) (231,667)     (231,667)
Ending Balance at Mar. 31, 2020 61,789,702 $ 15,373 161,235,389 (99,461,060)
Ending Balance, Shares at Mar. 31, 2020   15,372,905    
Beginning Balance at Dec. 31, 2020 68,042,972 $ 18,413 166,424,597 (98,400,038)
Beginning Balance, Shares at Dec. 31, 2020   18,413,419    
Stock-based compensation 309,610   309,610  
Stock option and warrant exercises 253,389 $ 277 253,112  
Stock option and warrant exercises, Shares   276,388    
Net income (loss) 1,146,740     1,146,740
Ending Balance at Mar. 31, 2021 $ 69,752,711 $ 18,690 $ 166,987,319 $ (97,253,298)
Ending Balance, Shares at Mar. 31, 2021   18,689,807