CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) (USD $)	3 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
Net sales	$ 1,701,949	$ 1,407,665
Cost of sales	(969,688)	(891,244)
Gross profit	732,261	516,421
Operating Expenses:
Selling, general and administrative	332,130	313,584
Research and development	87,980	85,936
Total operating expenses	420,110	399,520
Income from operations	312,151	116,901
Other Income (Expense):
Dividend and interest income	1,116	1,464
Interest expense	(308)	(573)
Total other income	808	891
Income before income tax	312,959	117,792
Provision for income taxes	(21,319)
Net income	291,640	117,792
Basic net income per common share (in Dollars per share)	$ 0.04	$ 0.02
Diluted net income per common share (in Dollars per share)	$ 0.04	$ 0.02
Weighted average number of common and Common Equivalent Shares:
Basic (in Shares)	6,952,339	6,868,339
Diluted (in Shares)	7,303,134	6,903,353
Net income	291,640	117,792
Other comprehensive loss, net of tax:
Foreign currency translation	(81)	(440)
Comprehensive income	$ 291,559	$ 117,352