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Stock-Based Compensation - Additional Information (Detail) (USD $)
12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares of common stock available for grant 367,000 1,111,000 888,000 569,000
Stock-based compensation $ 2,022,000 $ 836,000 $ 1,296,000  
Dividend yield 0.00%      
Assumed annualized forfeiture rate 5.00%      
Options granted 871,000 414,000 281,000  
Estimated total grant date fair market value 2,600,000      
Intrinsic value of options exercised 3,300,000 100,000 100,000  
Unrecognized compensation cost $ 1,300,000      
Weighted average remaining period 2 years 4 months 24 days      
Director Option Plan [Member] | Annual Non-Employee Director Grant [Member] | Prior to March 2010 [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, award vesting period 4 years      
Cliff vest percentage on the anniversary of the grant 25.00%      
Director Option Plan [Member] | Annual Non-Employee Director Grant [Member] | From March 2010 [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Annual option grants 6,000      
Director Option Plan [Member] | Initial Non-Employee Director Grant [Member] | From March 2010 [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Annual option grants 10,000      
Share-based compensation arrangement by share-based payment award, award annual vesting percentage 50.00%      
Employee Stock Option [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option contractual term 10 years      
Share-based compensation arrangement by share-based payment award, award vesting period 4 years      
Employee Stock [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Discount percentage, ESPP 15.00%      
Plan-defined purchase date intervals 6 months      
Shares available for issuance under employee stock purchase plan 314,000      
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted 112,500