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

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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