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INCOME TAXES (Details) - USD ($)	12 Months Ended
	May 31, 2019	May 31, 2018
INCOME TAXES (Details) [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Deferred Tax Assets, Valuation Allowance	$ 2,459,000	$ 1,549,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	900,000	$ 114,000
Domestic Tax Authority [Member]
INCOME TAXES (Details) [Line Items]
Operating Loss Carryforwards	6,956,000
California State Income Tax [Member]
INCOME TAXES (Details) [Line Items]
Operating Loss Carryforwards	3,934,000
Maximum [Member]
INCOME TAXES (Details) [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		35.00%
Minimum [Member]
INCOME TAXES (Details) [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%
Research Tax Credit Carryforward [Member] | Domestic Tax Authority [Member]
INCOME TAXES (Details) [Line Items]
Tax Credit Carryforward, Amount	389,000
Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member]
INCOME TAXES (Details) [Line Items]
Tax Credit Carryforward, Amount	$ 78,000

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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