Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Schedule of Share-based Compensation Rollforward (Details)

v3.7.0.1
Stock-Based Compensation Schedule of Share-based Compensation Rollforward (Details) - 2007 and 1992 Stock Incentive Plans - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Options outstanding, beginning of year (in shares) 1,813 1,635 1,748
Number of options granted 374 617 133
Options exercised (in shares) 0 (20) (86)
Options canceled (in shares) (679) (419) (160)
Options outstanding, end of year (in shares) 1,508 1,813 1,635
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Options outstanding, weighted-average exercise price, beginning of year (dollars per share) $ 10.00 $ 12.84 $ 12.95
Options granted, weighted-average exercise price (dollars per share) 2.86 4.73 14.58
Options exercised, weighted-average exercise price (dollars per share) 0.00 7.27 12.28
Options canceled, weighted-average exercise price (dollars per share) 12.66 13.45 15.75
Options outstanding, weighted-average exercise price, end of year (dollars per share) $ 7.03 $ 10.00 $ 12.84
Weighted-average remaining contractual term for options outstanding (In years) 4 years 263 days    
Aggregate intrinsic value of options outstanding (value) $ 0    
Options subject to exercise (in shares) 703 969 1,003
Weighted-average exercise price for options subject to exercise (dollars per share) $ 10.06 $ 13.09 $ 14.15
Weighted-average remaining contractual term for options subject to exercise 3 years 33 days    
Aggregate intrinsic value for options subject to exercise (value) $ 0    
Options vested and expected to vest (in shares) 1,501    
Weighted-average exercise price for options vested and expected to vest (dollars per share) $ 7.05    
Weighted-average remaining contractual term for options vested and expected to vest (In years) 4 years 258 days    
Aggregate intrinsic value of options vested and expected to vest (value) $ 0