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Shareholders' Equity Stock Option Activity Rollforward (Details) (Stock Options [Member], USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Stock Options [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Options, Outstanding, Number, Beginning Balance 2,154,112 1,789,784
Options, Grants in Period, Net of Forfeitures 2,920,000 792,000
Options, Exercises in Period 0 (25,288)
Options, Forfeitures in Period (1,446,645) (402,384)
Options, Outstanding, Number, Ending Balance 3,627,467 2,154,112
Options, Exercisable, Number 1,815,132  
Options, Vested and Expected to Vest, Outstanding, Number 3,539,499  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]    
Options, Outstanding, Weighted Average Exercise Price, Beginning Balance $ 1.49 $ 1.96
Options, Grants in Period, Weighted Average Exercise Price $ 0.31 $ 1.13
Options, Exercises in Period, Weighted Average Exercise Price $ 0.00 $ 0.68
Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price $ 1.64 $ 2.91
Options, Outstanding, Weighted Average Exercise Price, Ending Balance $ 0.48 $ 1.49
Options, Exercisable, Weighted Average Exercise Price $ 0.62  
Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price $ 0.48