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Note 10 - Fair Value Measurements | 9 Months Ended
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Sep. 30, 2023
Notes to Financial Statements |
Fair Value Disclosures [Text Block] | 10. Fair Value Measurements Fair Value of Financial Assets and Liabilities The Partnership’s financial assets and liabilities consist of cash and cash equivalents, a contract receivable and debt. The carrying amounts reported on the Consolidated Balance Sheets for cash and cash equivalents approximate fair value due to their short-term nature. The Partnership uses available market data and valuation methodologies to estimate the fair value of its debt and contract receivable. The following table shows the carrying value and estimated fair value of the Partnership's debt and contract receivable:
|  |  |  |  |  | September 30, 2023 |  |  | December 31, 2022 |
|  | Fair Value |  |  | Carrying |  |  | Estimated |  |  | Carrying |  |  | Estimated |
(In thousands) |  | Hierarchy Level |  |  | Value |  |  | Fair Value |  |  | Value |  |  | Fair Value |
Debt: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Opco Senior Notes (1) |  |  | 3 |  |  | $ | 79,481 |  |  | $ | 75,815 |  |  | $ | 98,281 |  |  | $ | 96,060 |
Opco Credit Facility (2) |  |  | 3 |  |  |  | 128,034 |  |  |  | 128,034 |  |  |  | 70,000 |  |  |  | 70,000 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract receivable, net (current and long-term) (3) |  |  | 3 |  |  | $ | 29,570 |  |  | $ | 24,880 |  |  | $ | 31,371 |  |  | $ | 24,833 |
(1) | The fair value of the Opco Senior Notes at September 30, 2023 and December 31, 2022 were estimated by management utilizing the present value replacement method incorporating the interest rate of the Opco Credit facility at September 30, 2023 and December 31, 2022, respectively.
(2) | The fair value of the Opco Credit Facility approximates the outstanding borrowing amount because the interest rates are variable and reflective of market rates and the terms of the credit facility allow the Partnership to repay the debt at any time without penalty.
(3) | The fair value of the Partnership's contract receivable is determined based on the present value of future cash flow projections related to the underlying asset at a discount rate of 15% at September 30, 2023 and December 31, 2022.
NRP has embedded derivatives in the preferred units related to certain conversion options, redemption features and the change of control provision that are accounted for separately from the preferred units as assets and liabilities at fair value on the Partnership's Consolidated Balance Sheets. Level 3 valuation of the embedded derivatives are based on numerous factors including the likelihood of the event occurring. The embedded derivatives are revalued quarterly and changes in their fair value would be recorded in other expenses, net on the Partnership's Consolidated Statements of Comprehensive Income. The embedded derivatives had zero value as of September 30, 2023 and December 31, 2022.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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