SIGNIFICANT ACCOUNTING POLICIES (Details) - Options Activity	9 Months Ended
	Feb. 28, 2022 $ / shares shares
Options Activity [Abstract]
Options Outstanding, Shares | shares	2,081,366
Option Outstanding, Exercise Price Weighted Average | $ / shares	$ 3.59
Option Granted, Shares | shares	307,000
Option Granted, Exercise Price Weighted Average | $ / shares	$ 4.44
Option Exercised, Shares | shares	(23,500)
Option Exercised, Exercise Price Weighted Average | $ / shares	$ 1.71
Option Cancelled or expired, Shares | shares	(28,750)
Option Cancelled or expired, Exercise Price Weighted Average | $ / shares	$ 3.49
Options Outstanding, Shares | shares	2,336,116
Option Outstanding, Exercise Price Weighted Average | $ / shares	$ 3.72