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Share-Based Payment Arrangements Stock Option Activity (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Number of Options Outstanding, Beginning 10,445  
Number of Options, Granted 0  
Number of Options, Exercised 0  
Number of Options, Forfeited 0  
Number of Options, Expired (665)  
Number of Options Outstanding, Ending 9,780 10,445
Number of Options, Exercisable 9,780  
Number of Options, Expected to Vest after end of period 0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]    
Weighted Average Exercise Price, Outstanding, Beginning (in dollars per share) $ 127.53  
Weighted Average Exercise Price, Granted (in dollars per share) 0  
Weighted Average Exercise Price, Exercised (in dollars per share) 0  
Weighted Average Exercise Price, Forfeited (in dollars per share)  
Weighted Average Exercise Price, Expired (in dollars per share) 331.50  
Weighted Average Exercise Price, Outstanding, Ending (in dollars per share) 113.66 $ 127.53
Weighted Average Exercise Price, Exercisable (in dollars per share) 113.66  
Weighted Average Exercise Price, Expected to Vest After End of Period (in dollars per share) $ 0  
Weighted Average Remaining Contractual Life (in years), Outstanding 4 years 3 months 4 years 11 months 15 days
Weighted Average Remaining Contractual Life (in years), Exercisable 4 years 3 months  
Weighted Average Remaining Contractual Life (in years), Expected to Vest after end of period 0 years  
Aggregate Intrinsic Value, Outstanding $ 0 $ 0
Aggregate Intrinsic Value, Exercisable 0  
Aggregate Intrinsic Value, Expected to Vest $ 0