STOCKHOLDERS' EQUITY (Details) - Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range - $ / shares		12 Months Ended
	May 31, 2020	May 31, 2022	May 31, 2021	Jan. 04, 2022	Jul. 17, 2021	Mar. 31, 2021	May 30, 2020
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise Price		$ 0.4125		$ 0.4125	$ 0.4	$ 1.1
Number of warrants outstanding (in Shares)		6,451,339	53,997,645				54,835,145
Weighted average remaining contractual life		1 year 5 months 12 days
Weighted average exercise price of outstanding warrants	$ 0.53	$ 0.5	$ 0.53
Number of warrants exercisable (in Shares)		6,451,339
Weighted average exercise price of exercisable warrants		$ 0.5
Warrants Exercisable at $0.40 to $0.41[Member]
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of warrants outstanding (in Shares)		3,326,339
Weighted average remaining contractual life		1 year 11 months 1 day
Weighted average exercise price of outstanding warrants		$ 0.41
Number of warrants exercisable (in Shares)		3,326,339
Weighted average exercise price of exercisable warrants		$ 0.41
Warrants Exercisable at $0.40 to $0.41[Member] | Minimum [Member]
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise Price		0.4
Warrants Exercisable at $0.40 to $0.41[Member] | Maximum [Member]
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise Price		0.41
Warrant Exercisable at $0.60 [Member]
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise Price		$ 0.6
Number of warrants outstanding (in Shares)		3,125,000
Weighted average remaining contractual life		11 months 12 days
Weighted average exercise price of outstanding warrants		$ 0.6
Number of warrants exercisable (in Shares)		3,125,000
Weighted average exercise price of exercisable warrants		$ 0.6