Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Summary of non-vested stock options (Details 2)

v3.8.0.1
Stock-based Compensation - Summary of non-vested stock options (Details 2)
 12 Months Ended
Dec. 31, 2017
$ / shares
shares
Shares  
Non-vested shares at December 31, 2016 (in shares) | shares 1,180,030
Granted | shares 1,260,000
Vested (in shares) | shares (245,402)
Forfeited (in shares) | shares (769,977)
Non-vested shares at December 31, 2017 (in shares) | shares 1,424,651
Weighted Average Grant Date Fair Value  
Non-vested shares at December 31, 2016 (in dollars per share) | $ / shares $ 1.56
Granted (in dollars per share) | $ / shares 0.79
Vested (in dollars per share) | $ / shares 1.76
Forfeited (in dollars per share) | $ / shares 1.28
Non-vested shares at December 31, 2017 (in dollars per share) | $ / shares $ 0.99