Condensed Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
REVENUES
Royalty income	$ 12,165,191	$ 3,441,528	$ 29,162,757	$ 6,050,147
Interest	26,384	1,117	40,199	3,812
Total revenues	12,191,575	3,442,645	29,202,956	6,053,959
EXPENSES
Expenses	227,330	234,494	762,869	855,814
Net income	$ 11,964,245	$ 3,208,151	$ 28,440,087	$ 5,198,145
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)	$ 0.9119	$ 0.2445	$ 2.1677	$ 0.3962
Distributions declared per unit (Note 3) (in dollars per unit)	$ 0.6400	$ 0.1000	$ 1.3500	$ 0.5000