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Goodwill and Purchased Intangibles Assets - Schedule of Estimated Future Amortization Expense (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]    
2016 (remaining 9 months) $ 746  
2017 900  
2018 400  
2019 and thereafter 0  
Net Carrying Amount $ 2,046 $ 2,300