Annual report pursuant to Section 13 and 15(d)

Summary of ASC 480 Allocation of Proceeds of Offering (Detail)

v3.7.0.1
Summary of ASC 480 Allocation of Proceeds of Offering (Detail)
 12 Months Ended
May 31, 2017
USD ($)
Stockholders Equity Note [Line Items]  
Proceeds from issuance of common shares $ 8,990,000
Common Stock Including Additional Paid in Capital  
Stockholders Equity Note [Line Items]  
Proceeds from issuance of common shares 6,334,417
Warrants (equity allocation)  
Stockholders Equity Note [Line Items]  
Proceeds from issuance of common shares $ 2,655,583