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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
 3 Months Ended
May 31, 2014
May 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net Income $ 66,642 $ 73,748
Depreciation and amortization 93,283 82,923
Stock based compensation expense 13,480 4,410
Allowance for doubtful accounts 3,000 3,000
Inventory reserve 30,000 13,343
Decrease (Increase) in:    
Accounts receivable (20,600) 78,417
Inventories (146,568) 112,707
Prepaid expenses and other current assets 45,486 2,446
(Decrease) Increase in:    
Accounts payable and accrued expenses (104,167) 36,620
Customer deposits (229,157) 129,376
Income taxes payable (111,929) 20,188
Net Cash Provided by (Used in) Operating Activities (360,530) 557,178
CASH FLOW FROM INVESTING ACTIVITIES:    
Patent application costs (17,550) (7,782)
Purchase of equipment and furnishings (90,682) (18,698)
Sale (Purchase) of marketable securities (505,903) 2,510
Net Cash (Used in) Investing Activities (614,135) (23,970)
CASH FLOW FROM FINANCING ACTIVITIES:    
Repayments of notes payable and loans (47,958) (31,049)
Net Cash (Used In) Financing Activities (47,958) (31,049)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS (1,022,623) 502,159
CASH AND CASH EQUIVALENTS    
Beginning of period 3,232,021 1,940,906
End of period 2,209,398 2,443,065
SUPPLEMENTAL DISCLOSURE:    
Interest paid 16,035 27,775
Taxes Paid $ 127,046 $ 0