Quarterly report pursuant to Section 13 or 15(d)

Stock based compensation, options and warrants (Schedule of Nonvested Awards) (Details)

v3.7.0.1
Stock based compensation, options and warrants (Schedule of Nonvested Awards) (Details) - Stock Incentive Plan [Member] - $ / shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Nonvested Shares Underlying Options    
Beginning balance 97,738  
Granted  
Vested (4,738)  
Forfeited (14,000)  
Ending balance 79,000  
Weighted Average Exercise Price    
Beginning balance $ 3.51  
Granted  
Vested 15.12  
Forfeited 3.00 $ 15.13
Ending balance 2.91  
Weighted Average Grant Date Fair Value    
Beginning balance 2.58  
Granted  
Vested 10.74  
Forfeited 2.25  
Ending balance $ 2.15