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Stock-Based Compensation - Range of Exercise Prices (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
Jun. 30, 2018
USD ($)
$ / shares
shares
Options Outstanding  
Number of Shares (in shares) | shares 1,316,271
Weighted Average Remaining Contractual Term (in years) 5 years 1 month 12 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 6.42
Aggregate Intrinsic Value (in dollars) | $ $ 5.2
Options Exercisable  
Number of Shares (in shares) | shares 726,143
Weighted Average Remaining Contractual Term (in years) 3 years 6 months 29 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 6.81
Aggregate intrinsic value (in dollars) | $ $ 2.6
$5.74  
Options Outstanding  
Number of Shares (in shares) | shares 28,602
Weighted Average Remaining Contractual Term (in years) 1 month 16 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 5.74
Aggregate Intrinsic Value (in dollars) | $ $ 0.1
Options Exercisable  
Number of Shares (in shares) | shares 28,602
Weighted Average Remaining Contractual Term (in years) 1 month 16 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 5.74
Aggregate intrinsic value (in dollars) | $ $ 0.1
$5.95  
Options Outstanding  
Number of Shares (in shares) | shares 1,180,257
Weighted Average Remaining Contractual Term (in years) 5 years 7 months 16 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 5.95
Aggregate Intrinsic Value (in dollars) | $ $ 5.1
Options Exercisable  
Number of Shares (in shares) | shares 590,129
Weighted Average Remaining Contractual Term (in years) 5 years 7 months 16 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 5.95
Aggregate intrinsic value (in dollars) | $ $ 2.5
$11.82  
Options Outstanding  
Number of Shares (in shares) | shares 107,412
Weighted Average Remaining Contractual Term (in years) 10 months 12 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 11.82
Aggregate Intrinsic Value (in dollars) | $ $ 0.0
Options Exercisable  
Number of Shares (in shares) | shares 107,412
Weighted Average Remaining Contractual Term (in years) 10 months 12 days
Weighted Average Exercise Price (in dollars per share) | $ / shares $ 11.82
Aggregate intrinsic value (in dollars) | $ $ 0.0