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Development, Commercialization and Supply Agreement - Additional Information (Detail) - USD ($)		12 Months Ended
	Feb. 26, 2015	Dec. 31, 2015
License And Collaboration Agreements [Line Items]
Licensing revenue		$ 769,000
Eddingpharm
License And Collaboration Agreements [Line Items]
Non-refundable up-front received	$ 15,000,000
Deferred revenue		$ 14,200,000
Licensing agreement term		16 years
Eddingpharm | Maximum
License And Collaboration Agreements [Line Items]
Additional upfront payment eligible to receive based on development, regulatory and sales Milestone	$ 154,000,000
Eddingpharm | Up-front Payment
License And Collaboration Agreements [Line Items]
Licensing revenue		$ 800,000

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response)
-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

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-Name Staff Accounting Bulletin (SAB)
-Number Topic 13
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Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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