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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, 2013
Restricted stock units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of RSUs, Beginning balance 3,350,616
Number of RSUs, Granted 60,000
Number of RSUs, Vested (30,334)
Number of RSUs, Cancelled (44,000)
Number of RSUs, Ending balance 3,336,282
Weighted-average grant date fair value per RSU, Beginning balance $ 1.70
Weighted-average grant date fair value per RSU, Granted $ 1.73
Weighted-average grant date fair value per RSU, Vested $ 3.26
Weighted-average grant date fair value per RSU, Cancelled $ 2.01
Weighted-average grant date fair value per RSU, Ending balance $ 1.68