Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Stock Option Activity (Details)

v3.19.3
Stock-based Compensation - Stock Option Activity (Details) - Stock Options [Member] - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of shares, Outstanding at beginning of year 1,624,746
Number of shares, Granted 400,814
Number of shares, Exercised (50,513)
Number of shares, Forfeited, expired or cancelled (165,432)
Number of shares, Outstanding at end of year 1,809,615
Number of shares, Exercisable at end of period 1,347,408
Weighted Average Exercise Price Per Share, Outstanding at January 1, 2019 $ 23.09
Weighted Average Exercise Price Per Share, Granted 14.49
Weighted Average Exercise Price Per Share, Exercised 4.86
Weighted Average Exercise Price Per Share, Forfeited, expired or cancelled 33.83
Weighted Average Exercise Price Per Share, Outstanding at September 30, 2019 20.71
Weighted Average Exercise Price Per Share, Exercisable at September 30, 2019 $ 23.16
Weighted Average Remaining Contractual Term (in years), Outstanding at September 30, 2019 7 years 18 days
Weighted Average Remaining Contractual Term (in years), Outstanding at September 30, 2019 6 years 5 months 19 days
Aggregate Intrinsic Value, Outstanding at September 30, 2019 $ 16,127
Aggregate Intrinsic Value, Exercisable at September 30, 2019 $ 12,921