Other License Agreements and Acquired Product Rights - Additional Information (Detail) - TTY License and Supply Agreement [Member] - USD ($) $ in Thousands					9 Months Ended
	Oct. 04, 2016	Jun. 30, 2016	Feb. 04, 2016	Oct. 07, 2010	Sep. 30, 2016
Other License Agreements And Acquired Product Rights [Line Items]
Upfront payment				$ 300
Milestone payments				$ 1,300
Term of the agreement					15 years
Milestone payment received		$ 240	$ 240
Subsequent Event [Member]
Other License Agreements And Acquired Product Rights [Line Items]
Milestone payment received	$ 400