Condensed Statements of Cash Flows (USD $)	3 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Cash flows from operating activities
Royalties received	$ 520,936	$ 1,146,901
Interest received	229	553
Expenses paid	(348,816)	(221,513)
Net cash provided by operating activities	172,349	925,941
Cash flows from investing activities
Maturities of U.S. Government Securities	105,000	83,000
Sale of U.S. Government Securities	100,056
Purchases of U.S. Government Securities	(100,340)	(82,380)
Net cash provided by investing activities	104,716	620
Cash flows used for financing activities
Distributions to Unitholders	(7,478,406)	(6,428,805)
Net change in cash and cash equivalents	(7,201,341)	(5,502,244)
Cash and cash equivalents, beginning of year	7,719,963	6,727,461
Cash and cash equivalents, end of period	518,622	1,225,217
Reconciliation of net income to net cash provided by operating activities
Net income	137,218	2,202,389
Decrease (increase) in accrued income receivable	17,730	(1,381,353)
Decrease in prepaid expenses	978	1,842
Increase in accrued expenses	16,423	103,063
Net cash provided by operating activities	172,349	925,941
Non Cash Financing Activity
Distributions payable		$ 1,049,601