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Share-Based Payments (Assumptions Used) (Details) - Stock Options - $ / shares
9 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Expected volatility (as a percent) 80.00% 80.00% 80.00% 80.00%
Risk-free interest rate (as a percent) 1.94% 2.04% 1.82% 1.92%
Expected dividend yield (as a percent) 0.00% 0.00% 0.00% 0.00%
Expected life (in years) 6 years 6 months 6 years 6 months 6 years 6 months 6 years 5 months 27 days
Estimated fair value per option granted (in dollars per share) $ 0.33 $ 2.55 $ 2.11 $ 3.73