Quarterly report pursuant to Section 13 or 15(d)

Stock Options, Warrants and Restricted Common Stock (Schedule of Award Activity) (Details)

v3.20.1
Stock Options, Warrants and Restricted Common Stock (Schedule of Award Activity) (Details) - Other common stock purchase options [Member] - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Shares Underlying Options/Warrants    
Outstanding, beginning 3,574,257  
Forfeited (20,000)  
Outstanding, ending 3,554,257 3,574,257
Exercisable 3,554,257  
Weighted Average Exercise Price    
Outstanding, beginning $ 19.48  
Forfeited 3.50  
Outstanding, ending 19.57 $ 19.48
Exercisable $ 19.57  
Weighted Average Remaining Contractual Term (Years)    
Outstanding 2 years 8 months 12 days 2 years 10 months 25 days
Exercisable 2 years 8 months 12 days  
Aggregate Intrinsic Value    
Outstanding  
Exercisable