Quarterly report pursuant to Section 13 or 15(d)

Stock Plans (Details 2)

v3.7.0.1
Stock Plans (Details 2) - Employee Stock Option [Member]
$ / shares in Units, shares in Thousands, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options, Outstanding | shares 2,002  
Options, Granted | shares 496  
Options, Exercised | shares 0  
Options, Expired or cancelled | shares (19)  
Options, Forfeited | shares 0  
Options, Outstanding | shares 2,479 2,002
Options, Exercisable at June 30, 2017 | shares 1,938  
Weighted Average Exercise Price, Outstanding at Beginning of Period | $ / shares $ 5.67  
Weighted Average Exercise Price, Granted | $ / shares 3.7  
Weighted Average Exercise Price, Exercised | $ / shares 0  
Weighted Average Exercise Price, Expired or cancelled | $ / shares 13.43  
Weighted Average Exercise Price, Forfeited | $ / shares 0  
Weighted Average Exercise Price, Outstanding at End of Period | $ / shares 5.22 $ 5.67
Weighted Average Exercise Price, Exercisable at June 30, 2017 | $ / shares $ 5.54  
Weighted Average Remaining Option Term, Outstanding (Years) 6 years 1 month 17 days 5 years 8 months 5 days
Weighted Average Remaining Option Term, Exercisable at June 30, 2017 5 years 2 months 23 days  
Aggregate Intrinsic Value, Outstanding | $ $ 0 $ 203
Aggregate Intrinsic Value, Exercisable at June 30, 2017 | $ $ 0