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Fair Value Measurements - Fair Value Inputs, Liabilities, Quantitative Information (Details) $ in Thousands | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
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Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Contingent consideration liabilities | $ 48,088 | $ 58,486
Revenue-based royalty | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Contingent consideration liabilities | 7,710 | 10,661
Supply chain milestone | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Contingent consideration liabilities |  | 13,593
Revenue milestones | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Contingent consideration liabilities | 66,114 | 57,982
Regulatory approval | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Contingent consideration liabilities | $ 2,885 |
Contingent receivable | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Contingent consideration asset |  | $ 607
Discount rate | Revenue-based royalty | Minimum | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent liability | 0.13 | 0.099
Discount rate | Revenue-based royalty | Maximum | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent liability | 0.24 | 0.25
Discount rate | Supply chain milestone | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent liability |  | 0.053
Discount rate | Revenue milestones | Minimum | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent liability | 0.09 | 0.033
Discount rate | Revenue milestones | Maximum | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent liability | 0.135 | 0.13
Discount rate | Regulatory approval | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent liability | 0.024 |
Discount rate | Contingent receivable | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent receivable asset |  | 0.10
Probability of milestone payment | Supply chain milestone | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent liability |  | 0.95
Probability of milestone payment | Regulatory approval | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent liability | 0.65 |
Probability of milestone payment | Contingent receivable | Discounted Cash Flow | Fair Value, Inputs, Level 3 |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |
Unobservable inputs, contingent receivable asset |  | 0.67

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- Definition Amount of asset recognized arising from contingent consideration in a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6411-128476 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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