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Income Taxes - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
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Jul. 31, 2013
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Jul. 31, 2012
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Jul. 31, 2013
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Jul. 31, 2012
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| Income Tax Disclosure [Abstract] | ||||
| Income tax expense (benefit) | $ (120) | $ 115 | $ (361) | $ 116 |
| Effective income tax rate, continuing operations | 18.00% | |||
| Effective income tax rate reconciliation, at federal statutory income tax rate | 35.00% | |||
| X | ||||||||||
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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