UNALLOCATED RESERVE AND DISTRIBUTIONS (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jul. 15, 2022	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Jan. 31, 2022
Unallocated Cash and Securities portion of Unallocated Reserve
Cash and U.S. Government securities		$ 25,789,547		$ 25,789,547		$ 47,727,522
Distribution payable		(11,020,810)		(11,020,810)		(22,960,018)
Unallocated cash and U.S. Government securities		14,768,737		14,768,737		$ 24,767,504
Reconciliation of Trust's Unallocated Reserve
Beginning Balance		30,745,127	$ 13,374,110	30,794,752	$ 16,477,049
Net income (loss)		(4,857,371)	26,756,030	8,737,814	35,329,900
Distributions declared		(11,020,810)	(1,180,801)	(24,665,620)	(12,857,610)
Ending Balance		$ 14,866,946	$ 38,949,339	$ 14,866,946	$ 38,949,339
Distributions declared per unit (in dollars per unit)	$ 0.84	$ 0.8400	$ 0.0900	$ 1.8800	$ 0.9800
Unallocated Reserve member
Reconciliation of Trust's Unallocated Reserve
Beginning Balance		$ 30,745,124	$ 13,374,107	$ 30,794,749	$ 16,477,046
Net income (loss)		(4,857,371)	26,756,030	8,737,814	35,329,900
Distributions declared		(11,020,810)	(1,180,801)	(24,665,620)	(12,857,610)
Ending Balance		14,866,943	38,949,336	14,866,943	38,949,336
Trust Corpus
Reconciliation of Trust's Unallocated Reserve
Beginning Balance		3	3	3	3
Ending Balance		$ 3	$ 3	$ 3	$ 3