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Fair Value Measurements Fair value hierarchy the Company’s financial assets and liabilities (Details) - USD ($)
Sep. 30, 2015
Dec. 31, 2014
May. 08, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Acquisition-related contingent consideration $ 13,880,000 $ 18,260,000 $ 11,900,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High     $ 90,000,000
Accrued Liabilities and Other Liabilities 13,880,000 18,260,000  
Business Combination, Liabilities Arising from Contingencies, Amount Recognized 13,900,000 12,800,000  
Fair Value, Inputs, Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent Consideration Classified as Equity, Fair Value Disclosure 0 0  
Accrued Liabilities and Other Liabilities 0 0  
Fair Value, Inputs, Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent Consideration Classified as Equity, Fair Value Disclosure 0 0  
Accrued Liabilities and Other Liabilities 0 0  
Fair Value, Inputs, Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent Consideration Classified as Equity, Fair Value Disclosure 13,880,000 18,260,000  
Accrued Liabilities and Other Liabilities 13,880,000 18,260,000  
Contingent Consideration Classified as Equity [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Acquisition-related contingent consideration 13,880,000 18,260,000  
Amorcyte, LLC [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Acquisition-related contingent consideration 0    
Contingent Consideration Classified as Equity [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent Consideration Classified as Equity, Fair Value Disclosure $ 13,880,000 $ 18,260,000