Goodwill and In-Process Research and Development - Additional Information (Detail) - USD ($)	1 Months Ended
	Jul. 31, 2014	Sep. 30, 2015	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill		$ 32,676,000	$ 31,534,000
Accumulated impairment loss, goodwill		0
In-Process Research and Development	$ 18,500,000	$ 15,243,000	$ 14,711,000
Fair value inputs, discount rate	22.50%