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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
 9 Months Ended
Nov. 30, 2013
Nov. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net Income $ 350,424 $ 96,101
Depreciation and amortization 243,869 265,428
Stock based compensation expense 14,127 48,934
Allowance for doubtful accounts 9,000 (6,620)
Inventory reserve 63,343 48,000
Write off of impaired acquisition costs 15,020   
Decrease (Increase) in:    
Accounts receivable 8,619 (312,190)
Inventories (280,746) 215,694
Prepaid expenses and other current assets 1,848 47,867
(Decrease) Increase in:    
Accounts payable and accrued expenses 245,865 (54,387)
Customer deposits 322,033 (193,415)
Income taxes payable 173,067 12,002
Net Cash Provided by Operating Activities 1,166,469 167,414
CASH FLOW FROM INVESTING ACTIVITIES:    
Patent application and other asset costs (18,421) (32,218)
Purchase of equipment and furnishings (77,321) (142,833)
Proceeds from sale of equipment 38,531   
Sale (Purchase) of marketable securities 19,977 (721,679)
Net Cash (Used in) Investing Activities (37,234) (896,730)
CASH FLOW FROM FINANCING ACTIVITIES:    
Proceeds from exercise of stock options 210 25,346
Repayments of notes payable and loans (94,017) (90,416)
Net Cash (Used In) Financing Activities (93,807) (65,070)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 1,035,428 (794,386)
CASH AND CASH EQUIVALENTS    
Beginning of period 1,940,906 2,531,689
End of period 2,976,334 1,737,303
SUPPLEMENTAL DISCLOSURE:    
Interest paid 82,396 86,012
Taxes Paid