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Stock-Based Compensation (Details) (USD $)
3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rate 1.32% 3.30%
Expected option life in years 6 years 6 months 6 years 6 months
Expected stock price volatility 75.00% 76.10%
Expected dividend yield 0.00% 0.00%
Weighted-average fair value of options granted $ 5.95 $ 3.76