Note 11 - Income Taxes - Reconciliation of Income Taxes (Details) - CAD ($)	12 Months Ended
May 31, 2019	May 31, 2018
Net loss for the year	$ (10,858,005)	$ (9,298,163)
Statutory Canadian corporate tax rate	26.42%	26.42%
Income tax recovery at statutory rates	$ (2,868,322)	$ (2,456,264)
Stock-based compensation	431,637	177,846
Effect of tax rate change	(12,432)	(109,857)
Difference in tax rates in other jurisdictions	(549,814)	(522,120)
Tax benefits not realized	2,998,931	2,910,395
Income tax recovery	$ 0	$ 0

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

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Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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