CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Operating activities
Royalties received	$ 13,542,442	$ 6,340,033
Interest received	465	653
Expenses paid	(444,394)	(983,331)
Net cash from operating activities	13,098,513	5,357,355
Investing activities
Maturities of U.S. Government securities		41,116,392
Purchases of U.S. Government securities		(41,035,723)
Net cash from investing activities		80,669
Financing activity
Distributions to unitholders	(22,960,018)	(6,035,205)
Net change in cash and cash equivalents	(9,861,505)	(597,181)
Cash and cash equivalents, beginning of period	47,727,522	12,500,941
Cash and cash equivalents, end of period	37,866,017	11,903,760
Reconciliation of net income to net cash from operating activities
Net income	13,595,185	8,573,870
Decrease (increase) in accrued income receivable	2,317,516	(5,363,355)
Decrease (increase) in contract asset	(2,970,857)	177,251
Decrease in prepaid expense	16,030	2,859
Increase (decrease) in accrued expenses	140,639	(157,409)
Increase in contract liability		2,124,139
Net cash from operating activities	13,098,513	5,357,355
Non cash financing activity
Distributions declared and payable	$ 13,644,810	$ 11,676,809