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Note 9 - Income Taxes (Detail) (USD $)
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12 Months Ended | |
|---|---|---|
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Jan. 31, 2013
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Jan. 31, 2012
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| Deferred Tax Assets, Tax Credit Carryforwards, Research | $ 2,563,000 | $ 2,576,000 |
| Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 37,600,000 | |
| Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 36,200,000 | |
| Deferred Tax Assets, Other | 2,000 | 19,000 |
| Valuation Allowances and Reserves, Period Increase (Decrease) | 600,000 | |
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Annually (Member)
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| Deferred Tax Assets, Other | 40,000 | |
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Domestic [Member]
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| Deferred Tax Assets, Tax Credit Carryforwards, Research | 1,700,000 | |
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State [Member]
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| Deferred Tax Assets, Tax Credit Carryforwards, Research | $ 2,100,000 |
| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total increases or decreases in allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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