Significant Accounting Policies (Details) - Options Activity - Share-based Payment Arrangement, Option [Member]	9 Months Ended
	Feb. 29, 2020 $ / shares shares
Significant Accounting Policies (Details) - Options Activity [Line Items]
Options Outstanding, Shares | shares	1,476,209
Option Outstanding, Exercise Price Weighted Average | $ / shares	$ 2.07
Option Granted, Shares | shares	356,000
Option Granted, Exercise Price Weighted Average | $ / shares	$ 2.79
Option Exercised, Shares | shares	(80,375)
Option Exercised, Exercise Price Weighted Average | $ / shares	$ 1.01
Option Cancelled or expired, Shares | shares	(47,500)
Option Cancelled or expired, Exercise Price Weighted Average | $ / shares	$ 3.25
Options Outstanding, Shares | shares	1,704,334
Option Outstanding, Exercise Price Weighted Average | $ / shares	$ 2.24