Liability Measured At Fair Value on Recurring Basis by Level within Fair Value Hierarchy (Detail) - USD ($)	May 31, 2017	[1]	May 31, 2016
Liability:
Derivative liability	$ 3,014,667		$ 0
Total liability	3,014,667		0
Level 3
Liability:
Derivative liability	3,014,667		0
Total liability	$ 3,014,667		$ 0

[1] The Company did not have any assets or liabilities measured at fair value using Level 1 or 2 of the fair value hierarchy as of May 31, 2017 and May 31, 2016.