Liability Measured At Fair Value on Recurring Basis by Level within Fair Value Hierarchy (Detail) - USD ($)		Aug. 31, 2018	May 31, 2018
Liability:
Derivative liability	[1]	$ 2,071,199	$ 1,323,732
Total liability	[1]	2,071,199	1,323,732
Level 3
Liability:
Derivative liability	[1]	2,071,199	1,323,732
Total liability	[1]	$ 2,071,199	$ 1,323,732

[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 August 31, 2018 and May 31, 2018.