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Stock Options and Warrants (Details 1) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Employee Stock Option [Member]    
Options    
Beginning balance 1,369,649 838,149
Granted during the period 560,000 613,000
Exercised during the period (15,000)
Terminated/Expired during the period (70,649) (66,500)
Ending balance 1,859,000 1,369,649
Exercisable 1,488,997  
Weighted average exercise price    
Beginning Balance $ 2.01 $ 3.08
Granted during the period 1.20 0.96
Exercised during the period 0.88
Terminated/Expired during the period 7.48 7.46
Ending Balance 1.56 $ 2.01
Exercisable $ 1.68  
Warrant [Member]    
Options    
Beginning balance 2,182,962 2,239,762
Granted during the period
Terminated/Expired during the period (56,800)
Ending balance 2,182,962 2,182,962
Exercisable 2,182,962  
Weighted average exercise price    
Beginning Balance $ 2.90 $ 3.10
Granted during the period
Terminated/Expired during the period 10.80
Ending Balance 2.90 $ 2.90
Exercisable $ 2.90  
Weighted Average Remaining Contractual Life (years)    
Beginning Balance 2 years 5 months 5 days 3 years 4 months 6 days
Ending Balance 1 year 5 months 5 days 2 years 5 months 5 days
Exercisable 1 year 5 months 5 days