Goodwill and In-Process Research and Development - Additional Information (Detail) - USD ($)	Jul. 01, 2014	Dec. 31, 2016	Mar. 31, 2016
Goodwill [Line Items]
Goodwill		$ 30,562,000	$ 33,003,000
In-process research and development		14,257,000	15,396,000
Accumulated impairment loss, goodwill		0
ECP Entwicklungsgesellschaft mbH
Goodwill [Line Items]
In-process research and development		$ 14,300,000	$ 15,400,000
Fair value inputs, discount rate	21.50%