Reconciliation of Federal Statutory Income Tax (Detail) |
12 Months Ended | ||
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May 31, 2019 |
May 31, 2018 |
May 31, 2017 |
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| Schedule Of Income Taxes [Line Items] | |||
| Income tax provision at statutory rate: | 21.00% | 28.60% | 34.00% |
| Rate Change | (34.80%) | ||
| Loss on debt extinguishment | (0.50%) | ||
| Derivative gain/loss | 0.60% | 1.00% | 2.80% |
| Valuation allowance release from Asset Acquisition | 4.80% | ||
| Non-deductible debt issuance costs | (0.20%) | ||
| Non-deductible interest on conversion | (0.30%) | (0.10%) | |
| Inducement charge | (0.10%) | (2.00%) | (1.00%) |
| Other | (1.10%) | ||
| Miscellaneous | (0.10%) | (0.10%) | |
| Current year credits generated | 4.40% | ||
| Credit carry forward generated (released) | (3.80%) | 4.10% | |
| Valuation allowance | (16.90%) | 0.30% | (35.70%) |
| Total | 4.80% | 0.00% | 0.00% |
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- Definition Effective Income Tax Rate Reconciliation, Derivative Gain Loss, Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation Inducement Charge No definition available.
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- Definition Effective Income Tax Rate Reconciliation Loss On Debt Conversion No definition available.
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- Definition Effective income tax rate reconciliation nondeductible expense debt issuance costs percent. No definition available.
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- Definition Effective Income Tax Rate Reconciliation Nondeductible Expense Interest No definition available.
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- Definition Effective income tax rate reconciliation tax credit carryforward. No definition available.
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- Definition Represents Effective Income Tax Reconciliation Valuation Allowance From Asset Acquisition. No definition available.
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- References No definition available.
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Percentage of the difference, between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, that is attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority interest income (expense), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, change in enacted tax rate, prior year income taxes, change in deferred tax asset valuation allowance, and other adjustments. No definition available.
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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