CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) (USD $)	3 Months Ended
	Aug. 31, 2013	Aug. 31, 2012
Net sales	$ 1,013,739	$ 1,701,949
Cost of sales	(753,448)	(969,688)
Gross profit	260,291	732,261
Operating Expenses:
Selling, general and administrative	342,802	332,130
Research and development	91,257	87,980
Total operating expenses	434,059	420,110
(Loss) income from operations	(173,768)	312,151
Other Income (Expense):
Dividend and interest income	6,054	1,116
Interest expense		(308)
Total other income	6,054	808
(Loss) income before income tax	(167,714)	312,959
Provision for income taxes		(21,319)
Net (loss) income	(167,714)	291,640
Basic net (loss) income per common share (in Dollars per share)	$ (0.02)	$ 0.04
Diluted net (loss) income per common share (in Dollars per share)	$ (0.02)	$ 0.04
Weighted average number of common and common equivalent shares:
Basic (in Shares)	7,280,866	6,952,339
Diluted (in Shares)	7,280,866	7,303,134
Net (loss) income	(167,714)	291,640
Other comprehensive loss, net of tax:
Foreign currency translation	(91)	(81)
Comprehensive (loss) income	$ (167,805)	$ 291,559