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Share-Based Compensation - Schedule of Share Based Compensation Restricted Stock Activity (Detail) - Restricted Stock
3 Months Ended
Sep. 30, 2018
$ / shares
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Number of Units, Unvested, Beginning Balance | shares 490,829
Number of Units, Granted | shares 64,573
Number of Units, Forfeited | shares (31,574)
Number of Units, Unvested, Ending Balance | shares 523,828
Weighted Average Fair Value, Unvested, Beginning Balance | $ / shares $ 3.88
Weighted Average Fair Value, Granted | $ / shares 4.40
Weighted Average Fair Value, Forfeited | $ / shares 3.97
Weighted Average Fair Value, Unvested, Ending Balance | $ / shares $ 3.94