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Goodwill and Purchased Intangibles Assets - Schedule of Estimated Future Amortization Expense (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]    
2017 $ 1,392  
2018 1,580  
2019 689  
Net Carrying Amount $ 3,661 $ 2,300