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UNALLOCATED RESERVE AND DISTRIBUTIONS (Tables) | 12 Months Ended
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Jan. 31, 2022
Schedule of unallocated cash and U.S. Government securities portion of the Trust's Unallocated Reserve | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | January 31, 2022 | ​ | January 31, 2021 | ​
Cash and U.S. Government securities | ​ | $ | 47,727,522 | ​ | $ | 22,407,610 | ​
Distribution payable | ​ |  | (22,960,018) | ​ |  | (6,035,205) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unallocated cash and U.S. Government securities | ​ | $ | 24,767,504 | ​ | $ | 16,372,405 | ​
Schedule of reconciliation of Trust's Unallocated Reserve | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Unallocated | ​ | ​ | Trust | ​ | ​ | ​ | ​
​ | ​ | ​ | Reserve | ​ | ​ | Corpus | ​ | ​ | Total | ​
Balances at January 31, 2021 |  | $ | 16,477,046 | ​ | $ | 3 | ​ | $ | 16,477,049 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ |  | 68,765,745 | ​ |  | — | ​ |  | 68,765,745 | ​
Distributions declared - $4.1500 per unit | ​ |  | (54,448,042) | ​ |  | — | ​ |  | (54,448,042) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balances at January 31, 2022 | ​ | $ | 30,794,749 | ​ | $ | 3 | ​ | $ | 30,794,752 | ​

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- Definition Tabular disclosure of reconciliation of the Trust's Unallocated Reserve. + References No definition available. + Details
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- Definition Tabular disclosure of unallocated cash and U.S. Government securities portion of the Trust's Unallocated Reserve. + References No definition available. + Details
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