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Significant Accounting Policies (Details Narrative) - USD ($) | 12 Months Ended
--- | ---
Feb. 28, 2019 | Feb. 28, 2018
Advertising expense | $ 246,681 | $ 280,348
Bad debt expense | $ 0 | $ 0
Concentration of Credit Risk | The Company had one customer, which accounted for 14% of sales during fiscal 2019. Two customers accounted for 41% of the outstanding accounts receivables at February 28, 2019. | The Company had one customer, which accounted for 8% of sales during fiscal 2018. Two customers accounted for 22% of the outstanding accounts receivables at February 28, 2018
Marketable securities including mutual funds | $ 2,365,706 | $ 4,405,900
Net unrealized gains | 1,422 |
Accumulated amortization of patents | 160,433 | $ 149,654
Annual Amortization Expense of Intangible Assets For the Next Five Years |  |
Annual amortization expense this year | 11,000 |
Annual amortization expense year two | 11,000 |
Annual amortization expense year three | 11,000 |
Annual amortization expense year four | 11,000 |
Annual amortization expense year five | $ 11,000 |
Buildings |  |
Annual Amortization Expense of Intangible Assets For the Next Five Years |  |
Property, plant and equipment, estimated useful lives | 40 Years |
Domestic Patents |  |
Useful life of intangible assets | 17 years |
Foreign Patents |  |
Useful life of intangible assets | 12 years |

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