FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)	May 31, 2022	May 31, 2021
Investment securities	$ 28,609,000	$ 580,000
Money Market Fund
Investment securities	28,609,000	580,000
Level 1
Investment securities	28,609,000	580,000
Level 1 | Money Market Fund
Investment securities	28,609,000	580,000
Level 2
Investment securities	0	0
Level 2 | Money Market Fund
Investment securities	0	0
Level 3
Investment securities	0	0
Level 3 | Money Market Fund
Investment securities	$ 0	$ 0