Goodwill and In-Process Research and Development - Additional Information (Detail) - USD ($)	1 Months Ended
	Jul. 31, 2014	Dec. 31, 2015	Mar. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill		$ 31,697,000	$ 31,534,000
Accumulated impairment loss, goodwill		0
In-process research and development	$ 18,500,000	$ 14,786,000	$ 14,711,000
Fair value inputs, discount rate	22.50%