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Share-Based Compensation - Restricted Stock Activity (Details) - Restricted Stock - $ / shares
6 Months Ended
Dec. 31, 2019
Jun. 30, 2019
Number of Restricted Stock [Roll Forward]    
Shares Awarded, Beginning balance (in shares) 32,056  
Restricted stock granted (in shares) 48,654  
Shares Awarded, Exercised/Released (in shares) (18,298)  
Shares Awarded, Cancelled/Forfeited (in shares) (1,704)  
Shares Awarded, Ending balance (in shares) 60,708  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 15.66 $ 21.10
Restricted stock granted, weighted average grant date fair value (in US$ per share) 15.05  
Weighted Average Grant Date Fair Value, Exercised/Released (in US$ per share) 23.98  
Weighted Average Grant Date Fair Value, Cancelled/Forfeited (in US$ per share) $ 31.70