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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Aug. 31, 2018
Aug. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net Income $ 80,554 $ 70,514
Adjustments to reconcile net income to net cash (used in) provided by operating activities:    
Depreciation and amortization 172,130 200,776
Stock based compensation expense 16,394 21,488
Inventory reserve 36,000 50,601
Unrealized loss on marketable securities 129,657
Decrease (Increase) in:    
Accounts receivable (518,699) 213,868
Inventories (332,704) (275,643)
Prepaid expenses and other current assets 24,682 28,857
(Decrease) Increase in:    
Accounts payable and accrued expenses 71,845 220,863
Customer deposits 88,398 533,485
Income taxes payable (76,365) (2,813)
Net Cash (Used In) Provided by Operating Activities (308,108) 1,061,996
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of equipment and furnishings (159,790) (42,917)
Sale of marketable securities 184,249  
Purchase of marketable securities   (1,141,754)
Net Cash Provided by (Used in) Investing Activities 24,459 (1,184,671)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Repayment of long term debt (77,410) (74,259)
Net Cash (Used In) Financing Activities (77,410) (74,259)
NET DECREASE IN CASH AND CASH EQUIVALENTS (361,059) (196,934)
CASH AND CASH EQUIVALENTS    
Beginning of period 2,016,464 2,557,223
End of period 1,655,405 2,360,289
SUPPLEMENTAL DISCLOSURE:    
Interest paid 20,817 24,031
Taxes Paid $ 101,426 $ 58,969