CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED) - USD ($)	3 Months Ended
	Aug. 31, 2015	Aug. 31, 2014
Net sales	$ 1,286,993	$ 1,034,450
Cost of sales	(865,572)	(724,539)
Gross profit	421,421	309,911
Operating Expenses:
Selling, general and administrative	339,660	338,316
Research and development	157,994	195,706
Total operating expenses	497,654	534,022
Loss from operations	(76,233)	(224,111)
Other Income (Expense):
Dividend and interest income	3,934	4,861
Interest expense	(36)	(18)
Total other income	3,898	4,843
Loss before income tax	$ (72,335)	$ (219,268)
Provision for income taxes
Net loss	$ (72,335)	$ (219,268)
Basic net loss per common share (in Dollars per share)	$ (0.01)	$ (0.03)
Diluted net loss per common share (in Dollars per share)	$ (0.01)	$ (0.03)
Weighted average number of common and Common Equivalent Shares:
Basic (in Shares)	7,582,056	7,547,839
Diluted (in Shares)	7,582,056	7,547,839
Net loss	$ (72,335)	$ (219,268)
Other comprehensive loss, net of tax:
Foreign currency translation	(343)	(934)
Comprehensive loss	$ (72,678)	$ (220,202)