Quarterly report pursuant to Section 13 or 15(d)

Stock based compensation, options and warrants (Schedule of Award Activity) (Details)

v3.19.3
Stock based compensation, options and warrants (Schedule of Award Activity) (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Stock Incentive Plan [Member]    
Shares Underlying Options    
Outstanding at January 1, 2019 62,000  
Forfeited (50,000)  
Outstanding at September 30, 2019 12,000 62,000
Exercisable at September 30, 2019 12,000  
Weighted Average Exercise Price    
Outstanding at September 30, 2019 $ 15.71  
Forfeited 18.50  
Outstanding at September 30, 2019 4.09 $ 15.71
Exercisable at September 30, 2019 $ 4.09  
Weighted Average Remaining Contractual Term    
Outstanding at September 30, 2019 4 years 8 years 2 months 12 days
Exercisable at September 30, 2019 4 years  
Aggregate Intrinsic Value    
Outstanding at September 30, 2019  
Outstanding at September 30, 2019
Exercisable at September 30, 2019  
Other common stock purchase options and warrants [Member]    
Shares Underlying Options    
Outstanding at January 1, 2019 1,671,113  
Granted 1,908,144  
Forfeited (5,000)  
Outstanding at September 30, 2019 3,574,257 1,671,113
Exercisable at September 30, 2019 3,574,257  
Weighted Average Exercise Price    
Outstanding at September 30, 2019 $ 39.47  
Granted 1.94  
Forfeited 7.90  
Outstanding at September 30, 2019 19.48 $ 39.47
Exercisable at September 30, 2019 $ 19.48  
Weighted Average Remaining Contractual Term    
Outstanding at September 30, 2019 3 years 1 month 6 days 2 years
Granted 5 years 2 months 12 days  
Exercisable at September 30, 2019 3 years 1 month 6 days  
Aggregate Intrinsic Value    
Outstanding at September 30, 2019  
Granted  
Outstanding at September 30, 2019
Exercisable at September 30, 2019