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) (Director And Consultants, USD $)
3 Months Ended 6 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Nov. 30, 2013
Nov. 30, 2012
Director And Consultants
       
Common Stock Issued For Services [Line Items]        
Stock-based compensation recognized $ 0 $ 21,000 $ 0 $ 186,000