Quarterly report pursuant to Section 13 or 15(d)

Stock Plans (Details 2)

v3.19.1
Stock Plans (Details 2) - USD ($)
$ / shares in Units, shares in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Options and Awards Outstanding at Beginning of Period 665  
Shares, Granted 5  
Shares, Cancelled (8)  
Number of Options and Awards Outstanding at End of Period 662 665
Shares, Exercisable at December 31, 2018 576  
Weighted Average Exercise Price, Outstanding at Beginning of Period $ 17.94  
Weighted Average Exercise Price, Granted 1.60  
Weighted Average Exercise Price, Cancelled 31.17  
Weighted Average Exercise Price, Outstanding at End of Period 11.92 $ 17.94
Weighted Average Exercise Price, Exercisable at December 31, 2018 $ 13.48  
Weighted Average Remaining Contractual Term, Outstanding (Years) 6 years 2 months 26 days 6 years 5 months 8 days
Weighted Average Remaining Contractual Term,Exercisable at December 31, 2018 5 years 9 months  
Aggregate Intrinsic Value,Outstanding at Beginning of Period $ 4,000  
Aggregate Intrinsic Value,Outstanding at End of Period 67,000 $ 4,000
Aggregate Intrinsic Value, Exercisable at December 31, 2017 $ 31