Stockholders' Equity - Schedule of Allocation of Stock-based Compensation for Equity Awards (Parenthetical) (Detail) $ in Millions	3 Months Ended
Sep. 30, 2015 USD ($)
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Reversal amount of stock-based compensation expense	$ 0.8

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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