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Fair Value Measurement (Reconciliation Of Liabilities Measured At Fair Value On A Recurring Basis Using Significant Unobservable Inputs (Level 3)) (Details) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Fair Value Measurement [Abstract]    
Beginning balance at January 1      
Addition of contingent liability 691,250   
Ending balance, net $ 691,250