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Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Aug. 31, 2011	Aug. 31, 2010	Aug. 31, 2011	Aug. 31, 2010
Income Statement [Abstract]
Net Sales	$ 3,149,960	$ 2,432,137	$ 6,139,028	$ 4,715,788
Cost of Goods Sold	1,471,513	1,315,865	3,027,484	2,482,488
Gross Profit	1,678,447	1,116,272	3,111,544	2,233,300
Operating Expenses
Research and product development costs	284,885	188,803	539,941	398,349
Marketing and selling expenses	580,617	510,833	1,148,253	1,033,254
General and administrative costs	323,853	289,061	627,037	576,226
Rental operations expense	23,965		63,793
Total Operating Expenses	1,213,320	988,697	2,379,024	2,007,829
Operating Income	465,127	127,575	732,520	225,471
Interest Expense	(29,594)	(2,397)	(59,367)	(5,835)
Interest Income	2,973	760	3,220	1,220
Income from Operations Before Income Taxes	438,506	125,938	676,373	220,856
Income Tax Expense	980	50	253	216
Net Income	$ 437,526	$ 125,888	$ 676,120	$ 220,640
Basic Earnings Per Share	$ 0.03	$ 0.01	$ 0.05	$ 0.02
Diluted Earnings Per Share	$ 0.03	$ 0.01	$ 0.05	$ 0.02
Weighted Average Shares - Basic	14,442,211	14,437,511	14,442,211	14,437,511
Weighted Average Shares - Diluted	14,784,319	14,568,332	14,759,663	14,594,030

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1448-109256



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 171

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Weighted-Average Number of Common Shares Outstanding

-URI http://asc.fasb.org/extlink&oid=6528421



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 8

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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