SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details)			1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 04, 2024 USD ($)	Sep. 06, 2024 USD ($)	Mar. 31, 2024 item	Oct. 31, 2024 USD ($) shares	Oct. 31, 2023 USD ($) shares	Oct. 31, 2024 USD ($) contract MT $ / T shares	Oct. 31, 2023 USD ($) shares	Jan. 31, 2024 USD ($) $ / T	Jan. 31, 2023 $ / T
Disaggregation of Revenue [Line Items]
Number of units outstanding | shares				13,120,010	13,120,010	13,120,010	13,120,010
Revenue from Contract with Customer [Abstract]
Royalty income (loss)				$ 7,348,366	$ 4,664,092	$ 19,613,693	$ 16,106,008
Base overriding royalties, first tier portion percentage						90.00%
Base overriding royalties, first tier shipment ceiling (in million tons) | MT						4
Base overriding royalties, second tier portion percentage						85.00%
Base overriding royalties, second tier shipment ceiling (in million tons) | MT						2
Base overriding royalties, third tier portion percentage						25.00%
Base overriding royalties, third tier shipment threshold (in million tons) | MT						6
Litigation settlement, damages	$ 71,185,029			71,185,029		$ 71,185,029
Bonus royalty percentage						0.50%
Bonus royalty, gross proceeds percentage						3.00%
Royalty bonuses, price above adjusted threshold price per ton | $ / T						2
Adjusted threshold price (in dollars per ton) | $ / T								67.75	66
Number of members on panel for arbitration | item			3
Litigation settlement, amount		$ 59,799,977
Litigation settlement, interest		$ 11,385,052
Litigation settlement, percentage		10.00%
Non recurring revenue						$ 71,185,029
Litigation Settlement, Gain	$ 71,185,029			71,185,029		$ 71,185,029
Percentage of fee interest owned by Mesabi Land Trust in the lands subject to the Peters Lease						20.00%
Number of customer contracts | contract						1
Net contract asset				669,276		$ 669,276		$ 451,896
Contract asset				669,276		669,276		451,896
Contract liability				0		$ 0		$ 0
Minimum
Revenue from Contract with Customer [Abstract]
Bonus royalty, gross proceeds percentage						1.00%
Royalty bonuses, adjusted threshold price | $ / T						10
First Million Tons Shipped or Deemed Shipped [Member]
Revenue from Contract with Customer [Abstract]
Royalty earned on tons shipped or deemed shipped, percentage						2.50%
Second Million Tons Shipped or Deemed Shipped [Member]
Revenue from Contract with Customer [Abstract]
Royalty earned on tons shipped or deemed shipped, percentage						3.50%
Third Million Tons Shipped or Deemed Shipped [Member]
Revenue from Contract with Customer [Abstract]
Royalty earned on tons shipped or deemed shipped, percentage						5.00%
Fourth Million Tons Shipped or Deemed Shipped [Member
Revenue from Contract with Customer [Abstract]
Royalty earned on tons shipped or deemed shipped, percentage						5.50%
Beyond Four Million Tons Shipped or Deemed Shipped [Member]
Revenue from Contract with Customer [Abstract]
Royalty earned on tons shipped or deemed shipped, percentage						6.00%
Base Overriding Royalties
Revenue from Contract with Customer [Abstract]
Royalty income (loss)				4,150,083	2,214,651	$ 11,131,795	8,550,118
Bonus Royalties
Revenue from Contract with Customer [Abstract]
Royalty income (loss)				3,027,705	2,252,620	8,024,502	7,050,557
Fee Royalties
Revenue from Contract with Customer [Abstract]
Royalty income (loss)				$ 170,578	$ 196,821	$ 457,396	$ 505,333