Statements of Income - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
REVENUES
Royalty income	$ 7,218,361	$ 14,301,838	$ 9,353,855	$ 19,663,627
Interest	24	42,386	33,293	147,469
Total revenues	7,218,385	14,344,224	9,387,148	19,811,096
EXPENSES
Expenses	542,382	432,537	1,099,524	989,121
Net income	$ 6,676,003	$ 13,911,687	$ 8,287,624	$ 18,821,975
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)	$ 0.5088	$ 1.0603	$ 0.6317	$ 1.4346
Distribution declared per unit (Note 3) (in dollars per unit)	$ 0.0500	$ 0.2100	$ 0.6100	$ 1.1000