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Collaborations and Licensing Arrangements - Additional Information (Detail 1) - USD ($) $ in Millions | Jun. 30, 2020 | May 31, 2018 | Dec. 31, 2016
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Collaboration and License Agreement | Receptor CLA | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2017-01-01 |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |
Deferred revenue recognition period |  |  | 4 years
Deferred revenue - nonrefundable license fee |  |  | $ 1.0
Collaboration and License Agreement | Receptor CLA | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2018-10-01 |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |
Deferred revenue recognition period | 39 months |  |
License and Distribution Agreement | Cipla Distribution Agreement | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2018-06-01 |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |
Deferred revenue recognition period |  | 15 years |
Deferred revenue - nonrefundable license fee |  | $ 2.2 |

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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 + Details
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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 + Details
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