Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Stock Option Activity (Details)

v3.19.2
Stock-based Compensation - Stock Option Activity (Details) - Stock Options [Member] - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 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 390,814
Number of shares, Exercised (25,861)
Number of shares, Forfeited, expired or cancelled (37,317)
Number of shares, Outstanding at end of year 1,952,382
Number of shares, Exercisable at end of period 1,246,774
Weighted Average Exercise Price Per Share, Outstanding at January 1, 2019 $ 23.09
Weighted Average Exercise Price Per Share, Granted 14.38
Weighted Average Exercise Price Per Share, Exercised 4.77
Weighted Average Exercise Price Per Share, Forfeited, expired or cancelled 60.01
Weighted Average Exercise Price Per Share, Outstanding at March 31, 2019 20.88
Weighted Average Exercise Price Per Share, Exercisable at March 31, 2019 $ 23.62
Weighted Average Remaining Contractual Term (in years), Outstanding at June 30, 2019 7 years 8 months 12 days
Weighted Average Remaining Contractual Term (in years), Exercisable at June 30, 2019 7 years 1 month 6 days
Aggregate Intrinsic Value, Outstanding at June 30, 2019 $ 7,856
Aggregate Intrinsic Value, Exercisable at June 30, 2019 $ 6,574