Goodwill and In-Process Research and Development - Additional Information (Detail) (USD $)	1 Months Ended
	Jul. 31, 2014	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Line Items]
Accumulated impairment loss, goodwill		$ 0
In-Process Research and Development	$ 18,500,000	$ 17,198,000
Fair value inputs, discount rate	22.50%