Quarterly report pursuant to Section 13 or 15(d)

Stock Plans - Option activity (Details)

v3.19.3
Stock Plans - Option activity (Details) - USD ($)
$ / shares in Units, shares in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Stock Plans    
Number of Options and Awards Outstanding at Beginning of Period 665  
Shares, Granted 854  
Shares, Cancelled (274)  
Number of Options and Awards Outstanding at End of Period 1,245 665
Shares, Exercisable at June 30, 2019 705  
Weighted Average Exercise Price, Outstanding at Beginning of Period $ 17.94  
Weighted Average Exercise Price, Granted 1.64  
Weighted Average Exercise Price, Cancelled 21.32  
Weighted Average Exercise Price, Outstanding at End of Period 6.02 $ 17.94
Weighted Average Exercise Price, Exercisable at June 30, 2019 $ 9.41  
Weighted Average Remaining Contractual Term, Outstanding (Years) 8 years 1 month 28 days 6 years 5 months 9 days
Weighted Average Remaining Contractual Term, Exercisable at December 31, 2018 7 years 1 month 13 days  
Aggregate Intrinsic Value, Outstanding at Beginning of Period $ 4,000  
Aggregate Intrinsic Value, Outstanding at End of Period   $ 4,000