Fair Value Measurements Fair value hierarchy the Company’s financial assets and liabilities (Details) - USD ($)	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	May. 08, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related contingent consideration	$ 13,460,000		$ 18,260,000	$ 11,900,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High				$ 90,000,000
Accrued Liabilities and Other Liabilities	13,460,000		18,260,000
Business Combination, Liabilities Arising from Contingencies, Amount Recognized	13,500,000		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	13,460,000		18,260,000
Accrued Liabilities and Other Liabilities	13,460,000		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	13,460,000		18,260,000
Amorcyte, LLC [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related contingent consideration	0	$ 5,600,000
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	$ 13,460,000		$ 18,260,000