Quarterly report pursuant to Section 13 or 15(d)

Activity Related to Notes (Detail)

v3.7.0.1
Activity Related to Notes (Detail) - USD ($)
12 Months Ended
May 31, 2016
Feb. 28, 2017
2013 Convertible Notes    
Debt Instrument [Line Items]    
Face amount of Notes $ 50,000  
Unamortized discount 0 $ 0
Conversions (50,000)  
Total carrying value of Notes 0 0
Short-Term Convertible Notes    
Debt Instrument [Line Items]    
Face amount of Notes 3,981,050  
Unamortized discount 0 0
Conversions (525,000)  
Payments upon maturity (762,250)  
Total carrying value of Notes 0 $ 0
Short-Term Convertible Notes | Tender Offer    
Debt Instrument [Line Items]    
Conversions $ (2,693,800)