Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Stock based compensation, options and warrants (Schedule of Restricted Stock Activity) (Details) - Restricted Stock [Member]
3 Months Ended
Mar. 31, 2018
$ / shares
shares
Number of shares  
Beginning balance | shares 496,152
Granted | shares 292,500
Vested | shares (30,913)
Forfeited | shares (26,563)
Delivered | shares (50,000)
Ending balance | shares 681,176
Weighted Average Grant Date Fair value  
Beginning balance | $ / shares $ 5.97
Granted | $ / shares 13.08
Vested | $ / shares 12.35
Forfeited | $ / shares 10.58
Delivered | $ / shares 4.50
Ending balance | $ / shares $ 8.66