Income Taxes (Details) - Schedule of the provision for income taxes - USD ($)	12 Months Ended
	May 31, 2021	May 31, 2020
Schedule of the provision for income taxes [Abstract]
Federal tax expense, Current		$ (586,000)
State tax expense, Current	48,000	22,000
Provisions for income taxes, Current, Total	48,000	(564,000)
Federal tax expense, Deferred	(96,000)	16,000
State tax expense, Deferred	(61,000)	(164,000)
Provisions of income taxes, Deferred, Total	(157,000)	(148,000)
Federal provision for income taxes	(96,000)	(570,000)
State provision for income taxes	(13,000)	(142,000)
Provision for income taxes, Total	$ (109,000)	$ (712,000)