Collaboration and Research Arrangements - Other Research Agreements (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] | ||||||||
| Revenue | $ 893 | $ 412 | $ 375 | $ 370 | $ 1,101 | $ 2,050 | $ 1,101 | $ 317 |
| Multinational Pharmaceutical Company | Other Research Agreements | ||||||||
| Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] | ||||||||
| Revenue | $ 1,100 | $ 300 | ||||||
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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