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Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans - Stock Options by Exercise Price (Details) - $ / shares
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price lower range (in dollars per share) $ 1.60 $ 1.60
Exercise price upper range (in dollars per share) $ 16.00 $ 16.00
Number outstanding (in shares) 361,128  
Options Outstanding Weighted- Average Remaining Contractual Life 6 years 5 months 23 days  
Weighted average exercise price (in dollars per share) $ 5.48  
Number exercisable (in shares) 223,166  
Options exercisable weighted average exercise price (in dollars per share) $ 4.92  
$1.60 – 3.55    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price lower range (in dollars per share) 1.60  
Exercise price upper range (in dollars per share) $ 3.55  
Number outstanding (in shares) 93,950  
Options Outstanding Weighted- Average Remaining Contractual Life 3 years 1 month 17 days  
Weighted average exercise price (in dollars per share) $ 3.06  
Number exercisable (in shares) 93,950  
Options exercisable weighted average exercise price (in dollars per share) $ 3.06  
$5.30 – 8.35    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price lower range (in dollars per share) 5.30  
Exercise price upper range (in dollars per share) $ 8.35  
Number outstanding (in shares) 266,578  
Options Outstanding Weighted- Average Remaining Contractual Life 7 years 7 months 28 days  
Weighted average exercise price (in dollars per share) $ 6.30  
Number exercisable (in shares) 128,616  
Options exercisable weighted average exercise price (in dollars per share) $ 6.22  
$16.00 – 16.00    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price lower range (in dollars per share) 16.00  
Exercise price upper range (in dollars per share) $ 16.00  
Number outstanding (in shares) 600  
Options Outstanding Weighted- Average Remaining Contractual Life 6 years 9 months 10 days  
Weighted average exercise price (in dollars per share) $ 16.00  
Number exercisable (in shares) 600  
Options exercisable weighted average exercise price (in dollars per share) $ 16.00