Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets Activity (Detail)

v3.8.0.1
Intangible Assets Activity (Detail) - USD ($)
Feb. 28, 2018
May 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross carrying amounts $ 3,500,000 $ 3,500,000
Accumulated amortization (1,881,327) (1,618,770)
Total amortizable intangible assets, net 1,618,673 1,881,230
Patents currently not amortized 35,989 35,989
Carrying value of intangibles, net $ 1,654,662 $ 1,917,219