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] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options, Outstanding 2,002  
Options, Granted 436  
Options, Exercised 0  
Options, Expired or cancelled (14)  
Options, Forfeited 0  
Options, Outstanding 2,424 2,002
Shares, Exercisable at March 31, 2017 1,823  
Weighted Average Exercise Price, Outstanding at Beginning of Period $ 5.67  
Weighted Average Exercise Price, Granted 3.89  
Weighted Average Exercise Price, Exercised 0  
Weighted Average Exercise Price, Expired or cancelled 17.21  
Weighted Average Exercise Price, Forfeited 0  
Weighted Average Exercise Price, Outstanding at End of Period 5.29 $ 5.67
Weighted Average Exercise Price, Exercisable at March 31, 2017 $ 5.60  
Weighted Average Remaining Option Term, Outstanding (Years) 6 years 3 months 7 days 5 years 8 months 5 days
Weighted Average Remaining Option Term, Exercisable at March 31, 2017 5 years 2 months 16 days  
Aggregate Intrinsic Value, Outstanding $ 8 $ 203
Aggregate Intrinsic Value, Exercisable at March 31, 2017 $ 8