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Assumptions Used in Determining Fair Value of Options Granted (Detail)
3 Months Ended
Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Expected term of options in years 6 years 3 months 18 days
Expected volatility 39.00%
Risk-free interest rate 1.90%
Expected dividend yield 0.00%