Quarterly report pursuant to sections 13 or 15(d)

Common Stock and Common Stock Payable Issued for Services - Additional Information (Detail)

v2.4.0.8
Common Stock and Common Stock Payable Issued for Services - Additional Information (Detail) (USD $)
3 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Director
   
Common Stock Issued For Services [Line Items]    
Stock-based compensation recognized $ 0 $ 12,000
Consultants
   
Common Stock Issued For Services [Line Items]    
Stock-based compensation recognized $ 0 $ 153,000