Income Taxes - Schedule of Significant Components of Deferred Tax (Details) - USD ($) |
Jul. 31, 2018 |
Jul. 31, 2017 |
|---|---|---|
| Income Tax Disclosure [Abstract] | ||
| Net operating loss carryforwards | $ 28,313,000 | $ 30,237,000 |
| Credits | 2,408,000 | 2,004,000 |
| Start-up costs | 24,000 | 46,000 |
| Accumulated depreciation | 162,000 | 170,000 |
| Option and stock awards | 5,703,000 | 4,886,000 |
| Other | 591,000 | 686,000 |
| Net deferred tax assets | 37,201,000 | 38,029,000 |
| Valuation allowance for deferred tax assets | (37,201,000) | (38,029,000) |
| Net deferred taxes |
| X | ||||||||||
- Definition Option and stock awards. No definition available.
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| X | ||||||||||
- Definition Start-up costs. No definition available.
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| X | ||||||||||
- 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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| X | ||||||||||
- Definition Amount after 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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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- 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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| X | ||||||||||
- 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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| X | ||||||||||
- Definition Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- 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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| X | ||||||||||
- References No definition available.
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