Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Goodwill And Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 500,000	$ 0	$ 500,000	$ 0
Acquired in-process research and development	11,200,000		11,200,000
Cost of Product [Member]
Goodwill And Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 300,000		$ 300,000
Maximum [Member]
Goodwill And Intangible Assets [Line Items]
Business acquisition measurement period			12 months