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Stock-Based Compensation (Summarized Stock Option Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding, Number of shares, Beginning Balance 809,274 846,607 2,077,524  
Exercised, Number of shares     (321,026)  
Granted, Number of shares 600,000      
Expired unexercised, Number of shares (370,000)   (474,443)  
Forfeitures, Number of shares (174,695) (37,333) (435,448)  
Outstanding, Number of shares, Ending Balance 864,579 809,274 846,607 2,077,524
Exercisable, Number of Shares 353,579      
Vested and expected to vest, Number of shares 864,579      
Outstanding, Weighted average exercise price, Beginning Balance $ 13.99 $ 13.87 $ 15.92  
Granted, Weighted average exercise price 6.20      
Exercised, Weighted average exercise price     8.97  
Expired unexercised, Weighted average exercise price 19.27   22.51  
Forfeitures, Weighted average exercise price 6.65 11.23 17.88  
Outstanding, Weighted average exercise price, Ending Balance 7.81 $ 13.99 $ 13.87 $ 15.92
Exercisable, Weighted average exercise price 10.15      
Vested and expected to vest, Weighted average exercise price $ 7.81      
Outstanding, Weighted average remaining contractual term (in years) 7 years 18 days 2 years 8 months 1 day 3 years 9 months 18 days 3 years 7 months 24 days
Granted, Weighted average remaining contractual term (in years) 10 years      
Exercisable, Weighted average remaining contractual term (in years) 3 years 10 months 2 days      
Vested and expected to vest, Weighted average remaining contractual term (in years) 7 years 18 days      
Outstanding, Aggregate intrinsic value, Beginning Balance $ 370 $ 486 $ 926  
Granted, Aggregate intrinsic value 1,212      
Exercised, Aggregate Intrinsic Value     3,607  
Forfeitures, Aggregate Intrinsic Value  
Expired unexercised, Aggregate Intrinsic Value      
Outstanding, Aggregate intrinsic value, Ending Balance $ 370 $ 486 $ 926
Outstanding, Weighted average grant date fair value, Beginning Balance $ 4.20 $ 4.21 $ 4.15  
Exercised, Weighted average grant date faie value     2.58  
Granted, Weighted average grant date fair value 2.02      
Expired unexercised, Weighted average grant date fair value 5.00   3.98  
Forfeitures, Weighted average grant date fair value 2.00 4.55 5.34  
Outstanding, Weighted average grant date fair value, Ending Balance $ 2.62 $ 4.20 $ 4.21 $ 4.15