Research and Development Agreements - Schedule of Contract Assets and Contract Liabilities for Performance Obligations related to Collaboration Agreements (Parenthetical) (Detail) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Contract With Customer Asset And Liability [Line Items] | ||
| Research and development revenue | $ 7,283,000 | $ 2,408,000 |
| Deferred Revenue | ||
| Contract With Customer Asset And Liability [Line Items] | ||
| Research and development revenue | $ 982,000 | |
| X | ||||||||||
- Definition Contract with customer asset and liability. No definition available.
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| X | ||||||||||
- Definition Research and development revenues from collaboration agreements. No definition available.
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| X | ||||||||||
- Details
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