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UNALLOCATED RESERVE AND DISTRIBUTIONS (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Jan. 31, 2014
UNALLOCATED RESERVE AND DISTRIBUTIONS
Cash and U.S. Government securities	$ 12,562,830		$ 12,562,830		$ 8,435,591
Distribution payable	(11,545,608)		(11,545,608)		(7,478,406)
Unallocated cash and U.S. Government securities	1,017,222		1,017,222		957,185
Reconciliation of unallocated reserve
Unallocated Reserve at the beginning of the period			984,094
Net income	11,539,606	6,136,515	19,093,365	15,963,684
Distributions declared			(15,744,011)
Unallocated Reserve at the end of the period	4,333,448		4,333,448
Minimum
UNALLOCATED RESERVE AND DISTRIBUTIONS
Unallocated cash and U.S. Government securities	500,000		500,000
Maximum
UNALLOCATED RESERVE AND DISTRIBUTIONS
Unallocated cash and U.S. Government securities	$ 1,000,000		$ 1,000,000

X

- Definition

Represents the amount of currency on hand as well as demand deposits with banks or financial institutions and U.S. Government securities.

+ References

No definition available.

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- Definition

The aggregate amount of distributions paid and declared in the period.

+ References

No definition available.

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- Definition

Represents the maintained level of unallocated reserve in the form of cash and U.S. Government securities.

+ References

No definition available.

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- Definition

1. Balance sheet - unallocated reserve definition - cell J21 - Should read "The cumulative amount of the reporting entity's undistributed earnings or deficit, consisting primarily of accrued income receivable representing royalties not yet received by the Trust but anticipated to be received in future periods.

+ References

No definition available.

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- Definition

Sum of the carrying values as of the balance sheet date of (a) interest payable on all forms of debt, including trade payables, that has been incurred, and (b) dividends declared but unpaid on equity securities issued by the entity and outstanding (also includes dividends collected on behalf of another owner of securities that are being held by the entity). Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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