Condensed Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
REVENUES
Royalty income	$ 13,347,355	$ 2,608,619	$ 16,997,566	$ 2,608,619
Interest	7,273	1,017	13,815	2,696
Total revenues	13,354,628	2,609,636	17,011,381	2,611,315
EXPENSES
Expenses	240,493	189,389	535,539	621,320
Net income	$ 13,114,135	$ 2,420,247	$ 16,475,842	$ 1,989,995
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)	$ 0.9996	$ 0.1845	$ 1.2558	$ 0.1517
Distributions declared per unit (Note 3) (in dollars per unit)	$ 0.1600	$ 0.2000	$ 0.7100	$ 0.4000