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Stockholders' Equity - Key Assumptions Used to Apply Option Pricing Model for Options Awarded (Detail)
3 Months Ended
Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Option life (in years) 6 years 3 months
Stock volatility 93.00%
Risk-free interest rate 2.00%
Expected dividends 0.00%