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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

May 31, 2018

Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

	2018			2017
Raw materials	$	1,000,000		$	830,000
Work in progress		854,000			728,000
Finished products		325,000			171,000
Total	$	2,179,000		$	1,729,000

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

	2018			2017
Dividend yield		0%			0%
Expected volatility		59.8-61.28%			53.64-54.73%
Risk free interest rate		1.61-2.53%			1.08-1.23%
Expected life		3.75-6.0 years			3.75-6.25 years

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

For the Years Ended May 31	2018			2017
Numerator :
Net loss for basic and diluted net loss per common share	$	(1,465,828)		$	(908,561)
Denominator for basic net loss per common share		8,570,029			8,329,769
Effect of dilutive securities:
Options		--			--
Denominator for diluted net loss per common share		8,570,029			8,329,769
Basic net loss per common share	$	(0.17)		$	(0.11)
Diluted net loss per common share	$	(0.17)		$	(0.11)

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