Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Stock Option Activity) (Details)

v3.10.0.1
Stock-Based Compensation (Stock Option Activity) (Details)
shares in Thousands
6 Months Ended
Jun. 30, 2018
$ / shares
shares
Stock-Based Compensation [Abstract]  
Number of Shares Underlying Options, Outstanding at January 1, 2018 | shares 2,597
Number of Shares Underlying Options, Granted | shares 671
Number of Shares Underlying Options, Exercised | shares (435)
Number of Shares Underlying Options, Forfeited/expired | shares (97)
Number of Shares Underlying Options, Outstanding at June 30, 2018 | shares 2,736
Number of Shares Underlying Options, Exercisable at June 30, 2018 | shares 1,540
Weighted Average Exercise Price Per Share, Outstanding at January 1, 2018 | $ / shares $ 1.77
Weighted Average Exercise Price Per Share, Granted | $ / shares 1.05
Weighted Average Exercise Price Per Share, Exercised | $ / shares 1.02
Weighted Average Exercise Price Per Share, Forfeited/expired | $ / shares 7.59
Weighted Average Exercise Price Per Share, Outstanding at June 30, 2018 | $ / shares 1.51
Weighted Average Exercise Price Per Share, Exercisable at June 30, 2018 | $ / shares $ 1.92