Statements of Income - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
REVENUES
Royalty income	$ 6,488,299	$ 13,891,273	$ 26,151,926	$ 39,663,012
Interest	72,542	82,570	220,011	146,830
Total revenues	6,560,841	13,973,843	26,371,937	39,809,842
EXPENSES
Expenses	410,645	388,781	1,399,766	1,037,477
Net income	$ 6,150,196	$ 13,585,062	$ 24,972,171	$ 38,772,365
WEIGHTED AVERAGE NUMBER OF UNITS OUTSTANDING	13,120,010	13,120,010	13,120,010	13,120,010
Net income per unit (Note 2) (in dollars per unit)	$ 0.4688	$ 1.0354	$ 1.9034	$ 2.9552
Distribution declared per unit (Note 3) (in dollars per unit)	$ 0.8700	$ 0.9400	$ 1.9700	$ 1.6100