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Significant Accounting Policies - Fair values of financial assets of the Company (Details) - USD ($) | May 31, 2021 | Feb. 28, 2021
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Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Marketable Securities, Current | $ 3,490,358 | $ 4,563,470
Level 1 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Marketable Securities, Current | 3,490,358 | 4,261,927
Level 2 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Marketable Securities, Current |  | 301,543
Level 3 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Marketable Securities, Current |  |

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