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Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Jun. 30, 2012
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Deferred Income Tax Assets And Liabilities [Line Items] |  |
Net operating loss carryforwards | $ 68,141 | $ 73,087
Research credits | 4,171 | 3,688
Capitalized research and development | 4 | 4
Stock compensation | 473 | 599
Accruals and Reserves | 139 | 348
Other | 350 | 504
Total deferred tax assets | 73,278 | 78,230
Valuation allowance for deferred tax assets | (73,216) | (78,168)
Net deferred tax assets, included in other assets | $ 62 | $ 62

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