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U. S. GOVERNMENT SECURITIES (Details) - U.S. government securities - USD ($) | Jan. 31, 2019 | Jan. 31, 2018
--- | --- | ---
Carrying Value |  |
Due within one year | $ 32,122,312 | $ 23,797,451
Total | 32,122,312 | 23,797,451
Fair Value, Inputs, Level 1 [Member] |  |
Fair Value |  |
Due within one year | 32,138,647 | 23,800,904
Total | $ 32,138,647 | $ 23,800,904

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