CONDENSED CONSOLIDATED STATEMENTS OF OPERATION (USD $)	3 Months Ended
	Aug. 31, 2011	Aug. 31, 2010
Net sales	$ 1,407,665	$ 1,177,712
Cost of sales	891,244	788,932
Gross profit	516,421	388,780
Operating Expenses:
Selling, general and administrative	313,584	303,158
Research and development	85,936	97,852
Total Operating Expenses	399,520	401,010
Income (loss) from operations	116,901	(12,230)
Other Income (Expense):
Interest income	1,464	2,143
Interest expense	(573)	(2,136)
Other income, net		37
Total Other Income (Expense)	891	44
Net income (loss)	117,792	(12,186)
Basic net income (loss) per common share	$ 0.02	$ 0.00
Diluted net income (loss) per common share	$ 0.02	$ 0.00
Weighted average number of common and common equivalent Shares:
Basic	6,868,339	6,660,839
Diluted	6,903,353	6,660,839
Other comprehensive loss, net of tax:
Foreign currency translation	(440)	(566)
Comprehensive income (loss)	$ 117,352	$ (12,752)