Annual report pursuant to section 13 and 15(d)

Intangible Assets (Detail)

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Intangible Assets (Detail) (USD $)
May 31, 2013
May 31, 2012
Acquisitions [Line Items]    
Gross carrying amounts $ 3,500,000  
Accumulated amortization (218,750)  
Total amortizable intangible assets, net 3,281,250  
Patents currently not amortized 35,989  
Carrying value of intangibles, net $ 3,317,239 $ 38,610