000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Consolidated Balance Sheets (Current Period Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Consolidated Statements of Partners' Capital (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Consolidated Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 006 - Disclosure - Note 1 - Basis of Presentation link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Revenues from Contracts with Customers link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Common Unit Distributions link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Net Income Per Common Unit link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Segment Information link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Equity Investment link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Mineral Rights, Net link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Debt, Net link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Related Party Transactions link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Major Customers link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 12 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 13 - Unit-Based Compensation link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 14 - Credit Losses link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 15 - Subsequent Events link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note 2 - Revenues from Contracts with Customers (Tables) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note 3 - Common Unit Distributions (Tables) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 4 - Net Income Per Common Unit (Tables) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 5 - Segment Information (Tables) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 6 - Equity Investment (Tables) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 7 - Mineral Rights, Net (Tables) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 8 - Debt, Net (Tables) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 9 - Fair Value Measurements (Tables) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 10 - Related Party Transactions (Tables) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 11 - Major Customers (Tables) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 13 - Unit-Based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 14 - Credit Losses (Tables) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 1 - Basis of Presentation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 2 - Revenues from Contracts with Customers - Disaggregation of Revenue (Details) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 2 - Revenues from Contracts with Customers - Assets and Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note 2 - Revenues from Contracts with Customers - Operating Lease Payments Receivable (Details) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note 3 - Common Unit Distributions (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995484 - Disclosure - Note 3 - Common Unit Distributions - Distributions Made to Partners (Details) link:calculationLink link:definitionLink link:presentationLink 995485 - Disclosure - Note 4 - Net Income Per Common Unit - Schedule of Earnings Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 995486 - Disclosure - Note 5 - Segment Information (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995487 - Disclosure - Note 5 - Segment Information - Information By Segment (Details) link:calculationLink link:definitionLink link:presentationLink 995488 - Disclosure - Note 6 - Equity Investment (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995489 - Disclosure - Note 6 - Equity Investment - Investment Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995490 - Disclosure - Note 7 - Mineral Rights, Net (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995491 - Disclosure - Note 7 - Mineral Rights, Net - Composition of Mineral Rights (Details) link:calculationLink link:definitionLink link:presentationLink 995492 - Disclosure - Note 8 - Debt, Net (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995493 - Disclosure - Note 8 - Debt, Net - Schedule of Long-term Debt (Details) link:calculationLink link:definitionLink link:presentationLink 995494 - Disclosure - Note 8 - Debt, Net - Schedule of Long-term Debt (Details) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 995495 - Disclosure - Note 9 - Fair Value Measurements (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995496 - Disclosure - Note 9 - Fair Value Measurements - Fair Value of Financial Assets and Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995497 - Disclosure - Note 10 - Related Party Transactions (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995498 - Disclosure - Note 10 - Related Party Transactions - General Partner Affiliates (Details) link:calculationLink link:definitionLink link:presentationLink 995499 - Disclosure - Note 11 - Major Customers - Concentration Risk (Details) link:calculationLink link:definitionLink link:presentationLink 995500 - Disclosure - Note 13 - Unit-Based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995501 - Disclosure - Note 13 - Unit-Based Compensation - Share-based Compensation Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995502 - Disclosure - Note 14 - Credit Losses (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995503 - Disclosure - Note 14 - Credit Losses - Allowance for Credit Losses (Details) link:calculationLink link:definitionLink link:presentationLink 995504 - Disclosure - Note 15 - Subsequent Events (Details Textual) link:calculationLink link:definitionLink link:presentationLink