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
 3 Months Ended
Mar. 31, 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 15,222
Options, Forfeited, expired or cancelled | shares (23,813)
Options, Outstanding at March 31, 2017 | shares 559,701
Options, Exercisable at March 31, 2017 | shares 317,119
Weighted Average Exercise Price Per Share, Outstanding at January 1, 2017 | $ / shares $ 77.70
Weighted Average Exercise Price Per Share, Granted | $ / shares 4.67
Weighted Average Exercise Price Per Share, Forfeited, expired or cancelled | $ / shares 140.84
Weighted Average Exercise Price Per Share, Outstanding at March 31, 2017 | $ / shares 73.03
Weighted Average Exercise Price Per Share, Exercisable at March 31, 2017 | $ / shares $ 119.38
Weighted Average Remaining Contractual Life (in years), Outstanding at March 31, 2017 6 years 11 months 1 day
Weighted Average Remaining Contractual Life (in years), Exercisable at March 31, 2017 4 years 11 months 27 days
Aggregate Intrinsic Value, Outstanding at March 31, 2017 | $ $ 363
Aggregate Intrinsic Value, Exercisable at March 31, 2017 | $ $ 3