Quarterly report pursuant to Section 13 or 15(d)

Derivative Liability - Additional Information (Detail)

v3.3.1.900
Derivative Liability - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 29, 2016
Feb. 28, 2015
Derivative [Line Items]        
Change in fair value of derivative liability   $ 1,261,545 $ 646,505 $ 455,970
AVCP Convertible Notes        
Derivative [Line Items]        
Change in fair value of derivative liability $ 0 $ 1,262,000 $ 647,000 $ 456,000