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Income Taxes - Schedule Of Differences Between Income Taxes At Statutory Federal Rate And Income Taxes Reported In Consolidated Statements of Operations (Detail)
 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Income Tax Rate Reconciliation [Line Items]      
Federal income tax expense at the statutory rate 35.00% 35.00% 35.00%
State income taxes, net of federal benefit 1.70% 1.60% 1.70%
Research and development credits, net of the federal tax on state credits (2.50%) (0.20%) (1.00%)
Uncertain tax positions, net of federal benefit on state positions 1.20% (0.10%) 0.20%
Incentive stock option and employee stock purchase plan expense 0.20% (0.30%) (0.50%)
Adjustment to deferred tax liability attributable to acquired intangible assets 1.60%    
Foreign rate differential 1.60% 0.80% 0.60%
Change in valuation allowance 2.60% 1.20% 0.70%
Basis difference, disposition of foreign subsidiary   (1.90%)  
California basis step-up election, net of related valuation allowance impact (1.20%)    
Other, net 0.40% 0.50% 0.20%
Effective income tax rate 40.60% 36.60% 36.90%