ROYALTY AGREEMENT, UNALLOCATED RESERVE AND DISTRIBUTIONS (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jul. 14, 2023	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022	Jan. 31, 2023
Unallocated Cash and Securities portion of Unallocated Reserve
Cash and cash equivalents		$ 17,750,909		$ 17,750,909		$ 13,966,500
Unallocated cash and cash equivalents		17,750,909		17,750,909		$ 13,966,500
Reconciliation of Trust's Unallocated Reserve
Beginning Balance		12,461,356	$ 30,745,127	11,438,217	$ 30,794,752
Net income		9,183,340	(4,857,371)	10,206,479	8,737,814
Distributions declared			(11,020,810)		(24,665,620)
Ending Balance		$ 21,644,696	$ 14,866,946	$ 21,644,696	$ 14,866,946
Distributions declared per unit (in dollars per unit)	$ 0	$ 0.0000	$ 0.8400	$ 0.0000	$ 1.8800
Unallocated Reserve member
Reconciliation of Trust's Unallocated Reserve
Beginning Balance		$ 12,461,353	$ 30,745,124	$ 11,438,214	$ 30,794,749
Net income		9,183,340	(4,857,371)	10,206,479	8,737,814
Distributions declared			(11,020,810)		(24,665,620)
Ending Balance		21,644,693	14,866,943	21,644,693	14,866,943
Trust Corpus
Reconciliation of Trust's Unallocated Reserve
Beginning Balance		3	3	3	3
Ending Balance		$ 3	$ 3	$ 3	$ 3