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Income Taxes (Operating Loss Carryforwards, Narrative) (Details) (USD $)
Dec. 31, 2012
Federal
  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards $ 48,566,499
Federal | Exercise of NonQualified Stock Options
  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 48,566,499
State
  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 54,383,744
Operating loss carryforwards, amount subject to full valuation allowance 2,400,000
Operating loss carryforwards, valuation allowance 2,400,000
State | Exercise of NonQualified Stock Options
  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards $ 51,800,000