Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation And Other Benefit Plans (Stock Option Activity) (Details)

v3.8.0.1
Stock-Based Compensation And Other Benefit Plans (Stock Option Activity) (Details) - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Stock-Based Compensation And Other Benefit Plans [Abstract]      
Number of Shares Underlying Options, Outstanding at January 1, 2017 2,644    
Number of Shares Underlying Options, Granted 1,629    
Number of Shares Underlying Options, Exercised (37)    
Number of Shares Underlying Options, Forfeited/expired (1,639)    
Number of Shares Underlying Options, Outstanding at December 31, 2017 2,597 2,644  
Number of Shares Underlying Options, Exercisable at December 31, 2017 1,506    
Weighted Average Exercise Price Per Share, Outstanding at January 1, 2017 $ 3.92    
Weighted Average Exercise Price Per Share, Granted 0.99 $ 1.14 $ 4.41
Weighted Average Exercise Price Per Share, Exercised 1.04    
Weighted Average Exercise Price Per Share, Forfeited/expired 4.48    
Weighted Average Exercise Price Per Share, Outstanding at December 31, 2017 1.77 $ 3.92  
Weighted Average Exercise Price Per Share, Exercisable at December 31, 2017 $ 2.30    
Weighted Average Remaining Contractual Term, Outstanding balance 3 years 6 months 11 days    
Weighted Average Remaining Contractual Term, Exercisable at end of period 3 years 3 months 11 days