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Fair Value Measurements Financial instruments with significant Level 3 inputs (Details) - USD ($) | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Mar. 31, 2015 | Dec. 31, 2014 | May. 08, 2014 | Oct. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Available-for-sale Securities | $ 3,011,700 |  |  | $ 7,080,000 |  |
Percentage of Net Sales |  |  |  |  |  | 10.00%
Percentage of license cost |  |  |  |  |  | 30.00%
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Acquisition-related contingent consideration | 13,460,000 |  |  | 18,260,000 | $ 11,900,000 |
Accrued Liabilities and Other Liabilities | 13,460,000 |  |  | 18,260,000 |  |
Change in acquisition-related contingent consideration | (4,800,000) | $ 400,000 |  |  |  |
Fair Value, Option, Changes in Fair Value, Gain (Loss) | (4,800,000) |  |  |  |  |
Contingent Consideration Classified as Equity [Member] |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Acquisition-related contingent consideration | 13,460,000 |  |  | 18,260,000 |  |
Change in acquisition-related contingent consideration | (4,800,000) |  |  |  |  |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Available-for-sale Securities | 0 |  |  | 0 |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Accrued Liabilities and Other Liabilities | 0 |  |  | 0 |  |
Contingent Consideration Classified as Equity, Fair Value Disclosure | 0 |  |  | 0 |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Available-for-sale Securities | 3,011,700 |  |  | 7,080,000 |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Accrued Liabilities and Other Liabilities | 0 |  |  | 0 |  |
Contingent Consideration Classified as Equity, Fair Value Disclosure | 0 |  |  | 0 |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Available-for-sale Securities | 0 |  |  | 0 |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Accrued Liabilities and Other Liabilities | 13,460,000 |  |  | 18,260,000 |  |
Contingent Consideration Classified as Equity, Fair Value Disclosure | 13,460,000 |  |  | $ 18,260,000 |  |
Amorcyte, LLC [Member] |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Acquisition-related contingent consideration | $ 0 |  | $ 5,600,000 |  |  |

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