Annual report pursuant to Section 13 and 15(d)

Stock Plans (Details 4)

v3.8.0.1
Stock Plans (Details 4) - Employee Stock Option [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Options and Awards Outstanding at Beginning of Period 2,002  
Shares, Granted 946  
Shares, Cancelled (114)  
Shares, Expired (106)  
Number of Options and Awards Outstanding at End of Period 2,728 2,002
Shares, Exercisable at December 31, 2017 2,108  
Weighted Average Exercise Price, Outstanding at Beginning of Period $ 5.67  
Weighted Average Exercise Price, Granted 2.55  
Weighted Average Exercise Price, Cancelled 5.27  
Weighted Average Exercise Price, Expired or cancelled 13.11  
Weighted Average Exercise Price, Outstanding at End of Period 4.32 $ 5.67
Weighted Average Exercise Price, Exercisable at December 31, 2017 $ 4.9  
Weighted Average Remaining Contractual Term, Outstanding (Years) 5 years 9 months 5 years 8 months 5 days
Weighted Average Remaining Contractual Term,Exercisable at December 31, 2017 5 years 4 months 2 days  
Aggregate Intrinsic Value,Outstanding at Beginning of Period $ 203  
Aggregate Intrinsic Value,Outstanding at End of Period 30 $ 203
Aggregate Intrinsic Value, Exercisable at December 31, 2017 $ 8