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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

May 31, 2019

Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

	2019			2018
Raw materials	$	1,208,000		$	1,000,000
Work in progress		771,000			854,000
Finished products		172,000			325,000
Total	$	2,151,000		$	2,179,000

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2019			2018
Dividend yield		0%			0%
Expected volatility		57.9-60.41%			59.8-61.28%
Risk free interest rate		2.33-2.85%			1.61-2.53%
Expected life		3.75-6.25 years			3.75-6.0 years

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

For the Years Ended May 31	2019			2018
Numerator :
Net loss for basic and diluted net loss per common share	$	(2,393,060)		$	(1,465,828)
Denominator for basic net loss per common share		9,212,557			8,570,029
Effect of dilutive securities:
Options		--			--
Denominator for diluted net loss per common share		9,212,557			8,570,029
Basic net loss per common share	$	(0.26)		$	(0.17)
Diluted net loss per common share	$	(0.26)		$	(0.17)

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