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Shareholders Equity - USD ($)
Common Stock
Additional Paid-In Capital
Retained Earnings / Accumulated Deficit
Total
Beginning Balance at Dec. 31, 2018 $ 5,883 $ 60,523,901 $ (48,125,349) $ 12,404,435
Beginning Balance (in shares) at Dec. 31, 2018 5,883,109      
Exercise of stock options $ 25 23,289   $ 23,314
Exercise of stock options (in shares) 24,494     24,494
Stock-based compensation   $ 519,891   $ 519,891
Restricted stock grants 110 (110)    
Restricted stock grants (in shares) $ 110,071      
Net income (loss)     286,586 286,586
Ending Balance at Dec. 31, 2019 $ 6,018 $ 61,066,971 (47,838,763) 13,234,226
Ending Balance (in shares) at Dec. 31, 2019 6,017,674      
Repurchase of common stock $ (5) (8,475)    
Repurchase of common stock (in shares) (5,538)      
Cancellation of restricted stocks $ (10) 10    
Cancellation of restricted stocks (in shares) (9,745)      
Exercise of stock options $ 100 167,965   $ 168,065
Exercise of stock options (in shares) 100,239     100,239
Stock-based compensation   507,051   $ 507,051
Net income (loss)     (3,278,601) (3,278,601)
Ending Balance at Dec. 31, 2020 $ 6,103 $ 61,733,522 $ (51,117,364) $ 10,622,261
Ending Balance (in shares) at Dec. 31, 2020 6,102,630