Income taxes (Details) - Components of deferred tax assets (liabilities) - USD ($) |
Jul. 31, 2018 |
Jul. 31, 2017 |
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| Deferred tax assets: | ||
| Federal tax carryforward losses | $ 13,975 | $ 18,831 |
| Provision for uncollectible accounts receivable | 791 | 1,392 |
| State and local tax carry forward losses | 352 | |
| Accrued royalties | 102 | 149 |
| Stock compensation | 575 | 782 |
| Depreciation | 581 | 804 |
| Research and development and other tax credit carryforwards | 1,286 | 2,208 |
| Foreign tax carryforward losses | 2,771 | 2,420 |
| Intangibles | 1,811 | 2,888 |
| Inventory | 1,786 | 2,536 |
| Accrued expenses | 1,194 | 1,420 |
| Other, net | 58 | 69 |
| Deferred tax assets | 25,282 | 33,499 |
| Prepaid expenses | (772) | (863) |
| Other, net | (39) | (55) |
| Deferred tax liabilities | (811) | (918) |
| Net deferred tax assets before valuation allowance | 24,471 | 32,581 |
| Less: valuation allowance | $ (24,471) | $ (32,581) |
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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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