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Income taxes (Detail) (USD $)
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Jul. 31, 2012
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Jul. 31, 2011
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| Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration | $ 86,900,000 | |
| Deferred Tax Assets Research And Development And Other Tax Credit Carryforwards | 795,000 | 633,000 |
| Foreign Loss Carryforwards | 400,000 | |
| Operating Loss Carryforwards On Acquisitions | 1,100,000 | |
| Undistributed Earnings of Foreign Subsidiaries | 164,000 | |
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U.S. Federal Tax [Member]
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| Deferred Tax Assets Research And Development And Other Tax Credit Carryforwards | $ 700,000 |
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from research and development and other tax credit carry forwards. No definition available.
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- Definition
Value of foreign loss carry forwards as of the reporting date. No definition available.
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- Definition
Amount of operating loss carry forwards on acquisitions No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates. No definition available.
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| X | ||||||||||
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- Definition
Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the United States that are not subject to U.S. federal income taxes. No definition available.
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