Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets Activity (Detail)

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Intangible Assets Activity (Detail) - USD ($)
Aug. 31, 2015
May. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross carrying amounts $ 3,500,000 $ 3,500,000
Accumulated amortization (1,006,250) (918,750)
Total amortizable intangible assets, net 2,493,750 2,581,250
Patents currently not amortized 35,989 35,989
Carrying value of intangibles, net $ 2,529,739 $ 2,617,239