Income taxes (Details) - Components of deferred tax assets (liabilities) - USD ($) $ in Thousands |
Jul. 31, 2017 |
Jul. 31, 2016 |
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| Deferred tax assets: | ||
| Federal tax carryforward losses | $ 18,831 | $ 18,964 |
| Provision for uncollectible accounts receivable | 1,392 | 1,406 |
| State and local tax carry forward losses | 2,757 | |
| Accrued royalties | 149 | 146 |
| Stock compensation | 782 | 616 |
| Depreciation | 804 | 769 |
| Research and development and other tax credit carryforwards | 2,208 | 2,152 |
| Foreign tax carryforward losses | 2,420 | 2,046 |
| Intangibles | 2,888 | 2,915 |
| Inventory | 2,536 | 2,477 |
| Accrued expenses | 1,420 | 1,321 |
| Unrealized foreign exchange | 100 | |
| Other, net | 69 | 63 |
| Deferred tax assets | 33,499 | 35,732 |
| Prepaid expenses | (863) | (820) |
| Other, net | (55) | |
| Deferred tax liabilities | (918) | (820) |
| Net deferred tax assets before valuation allowance | 32,581 | 34,912 |
| Less: valuation allowance | $ (32,581) | $ (34,912) |
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- References No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued royalties. No definition available.
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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 Amount of federal tax carry forward losses as of the reporting date. No definition available.
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- Definition Amount of net deferred tax assets (liabilities) before valuation allowance as of the reporting date. No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. 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 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 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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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. 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 foreign 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 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 accrued liabilities. 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 before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses on foreign currency transactions. 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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- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of deferred tax consequences attributable to taxable temporary differences derived from prepaid expenses. No definition available.
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