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v3.25.1

Note 10 - Fair Value Measurements (Details Textual) | Mar. 31, 2025 | Dec. 31, 2024
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Discount Rate | 15.00% | 15.00%

X
- Definition The percentage rate used to present value future cash flow projections. + References No definition available. + Details
Name: | nrp_DiscountRate
Namespace Prefix: | nrp_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant