Summary of Significant Accounting Policies - Contingencies (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
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| Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | ||
| Consulting agreement, contingent liability | $ 3.0 | |
| Consulting agreement, expense recognized | $ 1.5 | |
| Minimum | ||
| Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | ||
| Consulting agreement, contingent liability | $ 1.5 | |
| Maximum | ||
| Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | ||
| Consulting agreement, contingent liability | $ 4.0 | |
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- Definition Represents consulting agreement liability if certain future contingent events occur. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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