Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Stock Option Activity (Details)

v3.7.0.1
Stock-based Compensation - Stock Option Activity (Details) - Stock Options [Member]
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 30, 2017
USD ($)
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Options, Outstanding at January 1, 2017 | shares 568,292
Options, Granted | shares 1,023,222
Options, Forfeited, expired or cancelled | shares (171,826)
Options, Outstanding at June 30, 2017 | shares 1,419,688
Options, Exercisable at June 30, 2017 | shares 367,515
Weighted Average Exercise Price Per Share, Outstanding at January 1, 2017 | $ / shares $ 77.70
Weighted Average Exercise Price Per Share, Granted | $ / shares 4.06
Weighted Average Exercise Price Per Share, Forfeited, expired or cancelled | $ / shares 43.07
Weighted Average Exercise Price Per Share, Outstanding at June 30, 2017 | $ / shares 28.82
Weighted Average Exercise Price Per Share, Exercisable at June 30, 2017 | $ / shares $ 97.24
Weighted Average Remaining Contractual Life (in years), Outstanding at June 30, 2017 8 years 5 months 12 days
Weighted Average Remaining Contractual Life (in years), Exercisable at June 30, 2017 5 years 2 months 8 days
Aggregate Intrinsic Value, Outstanding at June 30, 2017 | $ $ 3,017
Aggregate Intrinsic Value, Exercisable at June 30, 2017 | $ $ 203