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Employee Benefit Plans (Schedule of Fair Value Assumptions for Stock Options and Employee Stock Purchase Plan Awards) (Details) - Employee Stock Purchase Plan
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Expected life 6 months 6 months 6 months
Risk-free interest rate     0.40%
Risk-free interest rate, maximum 2.22% 1.64%  
Risk-free interest rate, minimum 2.46% 1.15%  
Volatility 70.00% 42.00%  
Volatility, maximum     46.00%
Volatility, minimum     37.00%