Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
May. 31, 2015
May. 31, 2014
Schedule Of Income Taxes [Line Items]    
Federal statutory income tax rate 34.00% 34.00%
Net operating loss $ 49,581,217