Intangible Assets and Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Carrying amount of goodwill	$ 18,643	$ 18,643
In Process Research and Development [Member]
Goodwill And Intangible Assets Disclosure [Abstract]
Out-of-period adjustment	4,500
R&D expense [Member]
Goodwill And Intangible Assets Disclosure [Abstract]
Out-of-period adjustment	$ (4,500)