Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

v3.8.0.1
Stockholders' Equity (Details) - Restricted Stock [Member]
12 Months Ended
Dec. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Nonvested at December 31, 2016 | shares 2,533,063
Number of Units, Granted | shares 359,303
Number of Units, Vested | shares (281,250)
Nonvested at December 31, 2017 | shares 2,611,116
Nonvested at December 31, 2016 | $ / shares $ 2.93
Weighted Average Grant Date Fair Value, Granted | $ / shares 7.69
Weighted Average Grant Date Fair Value, Vested | $ / shares 0.07
Nonvested at December 31, 2017 | $ / shares $ 3.89