Quarterly report pursuant to Section 13 or 15(d)

GOING CONCERN - Additional Information (Detail)

v3.7.0.1
GOING CONCERN - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Feb. 28, 2017
Feb. 29, 2016
Feb. 28, 2017
Feb. 29, 2016
May 31, 2016
May 31, 2015
Cash Flow Supplemental Disclosures [Line Items]            
Deficit accumulated during the development stage $ 98,072,997   $ 98,072,997      
Net loss 1,261,860 $ 1,839,890 3,450,469 $ 7,655,252 $ 9,415,450 $ 11,619,796
Net Cash Provided by (Used in) Operating Activities, Continuing Operations, Total     (2,973,217) (3,093,578) 4,279,100 3,991,479
Cash and cash equivalents 580,962 $ 594,701 580,962 $ 594,701 $ 444,179 $ 928,279
Net working capital deficit $ 139,446   $ 139,446