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Income Taxes - Additional Information (Detail) (USD $)
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12 Months Ended | ||||
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Apr. 30, 2013
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Apr. 30, 2010
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Apr. 30, 2013
Internal Revenue Service (IRS)
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Apr. 30, 2013
State and Local Jurisdiction
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Apr. 30, 2013
Foreign Tax Authority
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| Schedule Of Income Taxes [Line Items] | |||||
| Net operating loss carryforward | $ 20,400,000 | $ 13,200,000 | $ 108,000,000 | ||
| Net operating loss carryforward, beginning expiration | 2028 | 2014 | |||
| Foreign tax credit carryforwards | 3,200,000 | ||||
| Foreign tax credit carryforwards, beginning expiration | 2023 | ||||
| Net operating loss carryforward, beginning expiration | 2014 | ||||
| Deferred tax liability | 900,000 | ||||
| Undestributed earning of foreign subsidiaries | 119,000,000 | ||||
| Unrecognized tax benefits liability | $ 2,023,000 | $ 3,532,000 | |||
| X | ||||||||||
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- Definition
Operating Loss Carryforwards Begin Expiring Year No definition available.
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- Definition
Operating Loss Carryforwards, Beginning Expiration Year No definition available.
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- Details
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- Definition
Tax Credit Carryforward, Beginning Expiration Year No definition available.
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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- Definition
The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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