Condensed Statements of Cash Flows (USD $)	3 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Cash flows from operating activities
Royalties received	$ 853,153	$ 520,936
Interest received	19	229
Expenses paid	(371,199)	(348,816)
Net cash provided by operating activities	481,973	172,349
Cash flows from investing activities
Maturities of U.S. Government Securities	82,320	105,000
Sale of U.S. Government Securities		100,056
Purchases of U.S. Government Securities	(82,628)	(100,340)
Net cash provided by (used for) investing activities	(308)	104,716
Cash flows used for financing activities
Distributions to unitholders	(8,396,806)	(7,478,406)
Net change in cash and cash equivalents	(7,915,141)	(7,201,341)
Cash and cash equivalents, beginning of year	8,717,943	7,719,963
Cash and cash equivalents, end of period	802,802	518,622
Reconciliation of net income to net cash provided by operating activities
Net income	940,266	137,218
Decrease (increase) in accrued income receivable	(464,838)	17,730
Decrease (increase) in prepaid expense	(917)	978
Increase in accrued expenses	7,462	16,423
Net cash provided by operating activities	$ 481,973	$ 172,349