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Goodwill and In-Process Research and Development - Additional Information (Detail) - USD ($)
Jul. 01, 2014
Mar. 31, 2016
Mar. 31, 2015
Jul. 31, 2014
Mar. 31, 2014
Goodwill [Line Items]          
Goodwill   $ 33,003,000 $ 31,534,000   $ 37,990,000
Accumulated impairment loss, goodwill   $ 0      
ECP Entwicklungsgesellschaft mbH          
Goodwill [Line Items]          
Goodwill $ 1,964,000        
In-process research and development $ 18,500,000     $ 18,500,000  
Fair value inputs, discount rate 22.50%