Reconciliation of Federal Statutory Income Tax Rate of 34 Percent to Effective Income Tax Rate (Detail) |
12 Months Ended | |
|---|---|---|
May. 31, 2015 |
May. 31, 2014 |
|
| Schedule Of Income Taxes [Line Items] | ||
| Income tax provision at statutory rate | 34.00% | 34.00% |
| State income taxes, net | 0.00% | 0.40% |
| Rate change | (0.60%) | (9.60%) |
| Derivative gain/loss | (1.20%) | |
| Valuation allowance | (32.20%) | (24.80%) |
| Total | 0.00% | 0.00% |
| X | ||||||||||
- Definition Effective Income Tax Rate Reconciliation, Derivative Gain Loss, Percent No definition available.
|
| X | ||||||||||
- Definition Schedule Of Income Taxes [Line Items] No definition available.
|
| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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/2003/role/presentationRef
|
| 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 applicable to statutory income tax expense (benefit) outside of the country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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 income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|