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Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	May 31, 2013	May 31, 2012
Schedule Of Income Taxes [Line Items]
Federal statutory income tax rate	3400.00%	3400.00%
Net operating loss	$ 21,000,000

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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