Net Deferred Tax Assets and Liabilities (Detail) - USD ($) |
May 31, 2018 |
May 31, 2017 |
|---|---|---|
| Schedule Of Income Taxes [Line Items] | ||
| Net Operating Loss | $ 29,230,279 | $ 32,530,436 |
| Credits | 4,260,470 | |
| ASC 718 Expense on NQO's | 2,916,585 | 4,284,246 |
| Charitable Contribution-Carry forward | 25,500 | |
| Accrued Expenses | 117,880 | 216,645 |
| Fixed Assets | 174 | 1,300 |
| Amortization | 139,875 | 186,772 |
| Capitalized Debt Issuance Costs | 157,992 | |
| Debt Discount | (31,072) | |
| Valuation allowance | (36,665,263) | (37,371,817) |
| Total | 0 | 0 |
| Noncurrent asset | 36,665,263 | 37,371,817 |
| Valuation Allowance | (36,665,263) | (37,371,817) |
| Total | $ 0 | $ 0 |
| X | ||||||||||
- Definition Deferred Tax Assets, Amortization No definition available.
|
| X | ||||||||||
- Definition Deferred Tax Assets Charitable Contributions No definition available.
|
| X | ||||||||||
- Definition Deferred Tax Assets (Liabilities) Net, Property, Plant and Equipment No definition available.
|
| X | ||||||||||
- Definition Deferred tax assets tax deferred capitalized debt issuance costs. No definition available.
|
| X | ||||||||||
- Definition Schedule Of Income Taxes [Line Items] No definition available.
|
| X | ||||||||||
- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences and carryforwards, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting and classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| 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
|
| 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
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- 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
|
| 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
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from financing arrangements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|