XML 53 R41.htm IDEA: XBRL DOCUMENT
v3.25.1

Note 3 - Warrants (Details Textual) - Warrants at 34.00 Strike Price [Member] - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2025 | Dec. 31, 2024
Class of Warrant or Right, Repurchased and Retired (in shares) | 1,219,665 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 34 |  |
Warrants and Rights Settled | $ 55.7 |  |
Partners' Capital Account, Units, Warrant Settlements (in shares) | 198,767 |  |
Class of Warrant or Right, Outstanding (in shares) |  | 0 | 0

X
- Definition The number of warrants or rights repurchased and retired during the period. + References No definition available. + Details
Name: | nrp_ClassOfWarrantOrRightRepurchasedAndRetired
Namespace Prefix: | nrp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Change in the number of units for each class of partners' capital accounts during the year due to warrant settlements. Partners include general, limited and preferred partners. + References No definition available. + Details
Name: | nrp_PartnersCapitalAccountUnitsWarrantSettlements
Namespace Prefix: | nrp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value of warrants and rights settled during the period. + References No definition available. + Details
Name: | nrp_WarrantsAndRightsSettled
Namespace Prefix: | nrp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=nrp_WarrantsAt3400StrikePriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |