U. S. GOVERNMENT SECURITIES (Details) - U.S. government securities - USD ($)	Jan. 31, 2020	Jan. 31, 2019
Carrying Value
Due within one year	$ 13,332,474	$ 32,122,312
Total	13,332,474	32,122,312
Fair Value, Inputs, Level 1 [Member]
Fair Value
Due within one year	13,337,529	32,138,647
Total	$ 13,337,529	$ 32,138,647

Amount of investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amount of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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