Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Nov. 30, 2012	Nov. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 96,101	$ 871,923
Depreciation and amortization	265,428	238,320
Stock based compensation expense	48,934	37,317
Allowance for doubtful accounts	(6,620)	9,000
Inventory reserve	48,000	54,000
Decrease (Increase) in:
Accounts receivable	(312,190)	334,610
Inventories	215,694	(1,038,566)
Prepaid expenses and other current assets	47,867	50,146
(Decrease) Increase in:
Accounts payable and accrued expenses	(54,387)	(73,724)
Customer deposits	(193,415)	32,638
Income taxes payable	12,002
Net Cash Provided by Operating Activities	167,414	515,664
CASH FLOW FROM INVESTING ACTIVITIES:
Patent application costs	(32,218)	(10,110)
Purchase of equipment and furnishings	(142,833)	(148,626)
Purchase of marketable securities	(721,679)
Net Cash (Used In) Investing Activities	(896,730)	(158,736)
CASH FLOW FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options	25,346	580
Proceeds from equipment financing - bank		237,000
Repayments of notes payable and loans	(90,416)	(70,726)
Net Cash (Used In) Provided by Financing Activities	(65,070)	166,854
NET (DECREASE) IN CASH AND CASH EQUIVALENTS	(794,386)	523,782
CASH AND CASH EQUIVALENTS
Beginning of period	2,531,689	1,683,801
End of period	1,737,303	2,207,583
SUPPLEMENTAL DISCLOSURE:
Interest paid	86,012	88,895
Taxes Paid		$ 1,021