Other License Agreements and Acquired Product Rights - Additional Information (Detail) - TTY License and Supply Agreement [Member] - USD ($)			3 Months Ended
	Feb. 04, 2016	Oct. 07, 2010	Mar. 31, 2017
Other License Agreements And Acquired Product Rights [Line Items]
Upfront payment		$ 300,000
Milestone payments		$ 1,300,000
Term of the agreement			15 years
Milestone payment received	$ 200,000		$ 0