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Stock-Based Compensation - Summary of Changes in Unvested Restricted Stock Units (Detail) (Restricted stock units [Member], USD $)
3 Months Ended
Sep. 30, 2014
Restricted stock units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of RSUs, Beginning balance 3,137,440
Number of RSUs, Granted 270,000
Number of RSUs, Vested (22,500)
Number of RSUs, Cancelled   
Number of RSUs, Ending balance 3,384,940
Weighted-average grant date fair value, Beginning balance $ 1.53
Weighted-average grant date fair value, Granted $ 1.90
Weighted-average grant date fair value, Vested $ 1.75
Weighted-average grant date fair value, Cancelled   
Weighted-average grant date fair value, Ending balance $ 1.55