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Warrants and Options Exercise Prices and Remaining Life (Details)
shares in Thousands
 12 Months Ended
Dec. 31, 2017
$ / shares
shares
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price [Line Items]  
Options 90
Weighted-Average Remaining Life (years) 3 years 4 months 24 days
Currently Exercisable (shares) 20
Exercise Price, $38.00  
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price [Line Items]  
Exercise Price | $ / shares $ 38.00
Options 40
Weighted-Average Remaining Life (years) 3 years 10 months 24 days
Currently Exercisable (shares) 0
Exercise Price, $40.00  
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price [Line Items]  
Exercise Price | $ / shares $ 40.00
Options 50
Weighted-Average Remaining Life (years) 3 years
Currently Exercisable (shares) 20