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Note 3 - Revenues From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue from contract with customers		$ 232,351	$ 278,733	$ 307,013
Mineral Rights Segment [Member] | Operating Segments [Member]
Revenue from contract with customers		240,948	291,144	324,889
Coal Royalty Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		159,033	218,011	226,956
Production Lease Minimum Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		4,365	3,322	5,854
Minimum Lease Straight-line Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		16,530	19,389	18,792
Carbon Neutral Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers	[1]	15,703	2,969	8,600
Property Tax Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		7,100	6,219	5,878
Wheelage Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		9,324	12,191	13,961
Coal Overriding Royalty Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		2,358	2,175	3,434
Lease Amendment Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		3,724	3,070	3,201
Aggregates Royalty Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		2,904	2,876	3,299
Oil and Gas Royalty Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		8,566	7,387	16,161
Other Revenues [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		2,744	1,124	877
Transportation and Processing Services [Member] | Mineral Rights Segment [Member]
Revenue from contract with customers		$ 8,597	$ 12,411	$ 17,876
[1] During 2024, NRP recorded revenues of approximately $13.4 million from a third party related to its creation of California Air Resources Board carbon offset credits from our properties. $11.3 million of this revenue was recorded in the three months ended December 31, 2024.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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