Income Taxes (Details 2) - USD ($)	May 31, 2020	May 31, 2019
Income Tax Disclosure [Abstract]
Allowance for doubtful accounts receivable	$ 52,000	$ 52,000
Accrued compensation and other accrued expenses	23,000	33,000
Net operating loss carryforwards	487,000	554,000
Equipment and leasehold improvement depreciation and amortization	(3,000)	1,000
Unrealized gain	(10,000)	(5,000)
Legal settlement with investor	233,000
Other items, net	2,000	1,000
Total deferred income tax assets	$ 784,000	$ 636,000