Income Taxes - Reconciliation of Tax Rates (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Feb. 28, 2023 |
Feb. 28, 2022 |
[1] | Feb. 28, 2023 |
Feb. 28, 2022 |
[1] | May 31, 2022 |
May 31, 2021 |
May 31, 2020 |
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| Income Taxes | |||||||||||
| Income tax expense | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | |||||
| Deferred tax benefit | $ 0 | $ 0 | $ 0 | ||||||||
| Effective Income Tax Rate Reconciliation Percent | |||||||||||
| Income tax provision at statutory rate | 21.00% | 21.00% | 21.00% | ||||||||
| Non-deductible interest on convertible notes | (0.50%) | (0.60%) | |||||||||
| Inducement interest expense | (0.70%) | (1.50%) | |||||||||
| Other | 1.10% | ||||||||||
| Credit carry forward generated (released) | (0.20%) | (0.10%) | |||||||||
| Non-deductible loss on induced conversion | (3.70%) | (2.60%) | |||||||||
| Non-deductible debt discount amortization | (0.30%) | (0.60%) | |||||||||
| IRC section 162(m) limitation | (0.10%) | (1.10%) | |||||||||
| Stock compensation in excess of ASC 718 | 0.00% | 1.70% | |||||||||
| Non-deductible expense on induced conversion of debt | (0.30%) | (1.20%) | |||||||||
| Valuation allowance | (16.30%) | (15.00%) | |||||||||
| Effective income tax rate | 0.00% | 0.00% | 0.00% | ||||||||
| ASC 842 lease accounting | $ 117 | $ 0 | |||||||||
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| X | ||||||||||
- Definition Amount of deferred tax assets attributable to taxable temporary differences from leasing arrangements. No definition available.
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| X | ||||||||||
- Definition Effective Income Tax Rate Reconciliation Inducement Charge No definition available.
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| X | ||||||||||
- Definition Effective income tax rate reconciliation non deductible expense IRC 162 limitation. No definition available.
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| X | ||||||||||
- Definition Effective Income Tax Rate Reconciliation Nondeductible Expense Interest No definition available.
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| X | ||||||||||
- 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 loss on induced conversion. No definition available.
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| X | ||||||||||
- Definition Effective income tax rate reconciliation nondeductible expense on induced conversion of debt. No definition available.
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| X | ||||||||||
- Definition Effective income tax rate reconciliation tax credit carryforward. No definition available.
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| X | ||||||||||
- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- 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://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- 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 amortization. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- 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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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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