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Summary of Significant Accounting Policies (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Summary of Significant Accounting Policies [Abstract]        
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) $ 9,400,000 $ 0 $ 9,400,000 $ 0
Clinical Services Reimbursement $ 900,000 $ 1,100,000 $ 1,400,000 $ 1,800,000