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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
May 31, 2017
May 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net Income $ 15,869 $ 55,791
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 101,808 114,813
Stock based compensation expense 10,469 7,552
Inventory reserve 27,000 28,000
Decrease (Increase) in:    
Accounts receivable (136,070) 396,294
Inventories 63 (134)
Prepaid expenses and other current assets 36,720 32,012
(Decrease) Increase in:    
Accounts payable and accrued expenses 21,486 (164,774)
Customer deposits 268,176 (23,979)
Income taxes payable 12,563 (6,507)
Net Cash Provided by Operating Activities 358,084 439,068
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of equipment and furnishings (39,704) (93,772)
(Purchase) of marketable securities (537,265) (62,343)
Net Cash (Used in) Investing Activities (576,969) (156,115)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Repayments of notes payable and loans (37,135) (35,507)
Net Cash (Used In) Financing Activities (37,135) (35,507)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (256,020) 247,446
CASH AND CASH EQUIVALENTS    
Beginning of period 2,557,223 2,388,355
End of period 2,301,203 2,635,801
SUPPLEMENTAL DISCLOSURE:    
Interest paid $ 12,213 13,745
Taxes Paid   $ 16,082