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Stock Options and Warrants (Details 1) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Employee Stock Option [Member]    
Options    
Beginning balance 838,149 1,048,627
Granted during the period 613,000 88,000
Exercised during the period (15,000)
Terminated/Expired during the period (66,500) (298,478)
Ending balance 1,369,649 838,149
Exercisable 1,269,649  
Weighted average exercise price    
Beginning Balance $ 3.08 $ 3.20
Granted during the period 0.96 1.56
Exercised during the period 0.88
Terminated/Expired during the period 7.46 3.04
Ending Balance 2.01 $ 3.08
Exercisable $ 2.06  
Warrant [Member]    
Options    
Beginning balance 2,239,702 1,704,102
Granted during the period   535,600
Exercised during the period  
Terminated/Expired during the period (56,800)  
Ending balance 2,182,902 2,239,702
Weighted average exercise price    
Beginning Balance $ 3.10 $ 2.66
Granted during the period 1.45
Exercised during the period  
Terminated/Expired during the period 10.80
Ending Balance 2.90 3.10
Exercisable $ 2.90 $ 3.10
Beginning Balance   4 years 15 days
Granted   4 years 4 months 6 days
Ending Balance   3 years 4 months 6 days
Exercisable 2 years 5 months 5 days