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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

May 31, 2017

Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

	2017			2016
Raw materials	$	830,000		$	942,000
Work in progress		728,000			690,000
Finished products		171,000			231,000
Total	$	1,729,000		$	1,863,000

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

	2017			2016
Dividend yield		0%			0%
Expected volatility		53.64-54.73%			51.77-55.29%
Risk free interest rate		1.08-1.23%			1.55-1.75%
Expected life		3.75-6.25 years			3.75-6.25 years

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

For the Years Ended May 31	2017			2016
Numerator for basic and diluted net loss per common share	$	(908,561)		$	(1,499,787)
Denominator for basic net loss per common share		8,329,769			7,626,078
Effect of dilutive securities:
Options		--			--
Denominator for diluted net loss per common share		8,329,769			7,626,078
Basic net loss per common share	$	(0.11)		$	(0.20)
Diluted net loss per common share	$	(0.11)		$	(0.20)

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