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Income Taxes - The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities (Details) (USD $)
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Apr. 30, 2014
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Apr. 30, 2013
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| Deferred tax assets: | ||
| Compensated absences and severance, principally due to accruals for financial reporting purposes | $ 75,000 | $ 150,000 |
| Stock-based compensation expense | 1,275,000 | 1,259,000 |
| Accounts receivable, principally due to allowance for doubtful accounts and sales returns | 86,000 | 78,000 |
| Property and equipment, principally due to differences in depreciation | 240,000 | 106,000 |
| Intangible assets | 430,000 | 464,000 |
| Inventories | 68,000 | 91,000 |
| Domestic net operating losses | 10,134,000 | 9,089,000 |
| Alternative minimum tax | 438,000 | 438,000 |
| Other | 153,000 | 61,000 |
| Deferred tax assets | 12,899,000 | 11,736,000 |
| Valuation allowance | (12,899,000) | (11,736,000) |
| Net deferred tax assets |
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill. No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from severance costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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