Annual report pursuant to Section 13 and 15(d)

Stock Plans (Details)

v3.8.0.1
Stock Plans (Details) - $ / shares
shares in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options and Awards Outstanding at Beginning of Period 2,002   1,269
Number of Options and Awards Outstanding, Increase in shares reserved   0 0
Options granted 946 168 700
Options cancelled and forfeited (114)    
Options exercised   (8)  
Options expired (106) (41) (20)
Awards issued     (66)
Number of Options and Awards Outstanding, Termination of option plan     0
Number of Options and Awards Outstanding at End of Period 2,728 2,002  
Weighted Average Exercise Price, Outstanding at Beginning of Period $ 5.67   $ 6.40
Weighted Average Exercise Price, Increase in shares reserved   $ 0 0
Weighted Average Exercise Price, Options granted 2.55 5.1 4.46
Weighted Average Exercise Price, Options cancelled and forfeited 5.27    
Weighted Average Exercise Price,Options exercised   3.37  
Weighted Average Exercise Price, Options expired 13.11 10.85 13.27
Weighted Average Exercise Price, Awards issued     0
Weighted Average Exercise Price, Termination of option plan     $ 0
Weighted Average Exercise Price, Outstanding at End of Period $ 4.32 $ 5.67  
Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares or Awards Available For Grant, Balance at Beginning of Period 1,882 914 282
Number of Options and Awards Outstanding at Beginning of Period   1,883  
Shares or Awards Available For Grant, Increase in shares reserved   1,136 1,364
Options granted (946) (168) (700)
Options cancelled and forfeited 60    
Options exercised   0  
Options expired 0 0 0
Awards issued     0
Shares or Awards Available For Grant, Termination of option plan     (32)
Shares or Awards Available For Grant, Balance at End of Period 996 1,882 914
Number of Options and Awards Outstanding at End of Period     1,883
Weighted Average Exercise Price, Outstanding at Beginning of Period   $ 5.83  
Weighted Average Exercise Price, Outstanding at End of Period     $ 5.83