Condensed Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
REVENUES
Royalty income	$ 3,441,528	$ 2,619,097	$ 6,050,147	$ 6,667,942
Interest	1,117	2,468	3,812	6,993
Total revenues	3,442,645	2,621,565	6,053,959	6,674,935
EXPENSES
Expenses	234,494	219,498	855,814	848,958
Net income	$ 3,208,151	$ 2,402,067	$ 5,198,145	$ 5,825,977
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)	$ 0.2445	$ 0.1831	$ 0.3962	$ 0.4441
Distributions declared per unit (Note 3) (in dollars per unit)	$ 0.1000		$ 0.5000	$ 0.0400