000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Condensed Consolidated Statements of Operations (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 006 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 1 - Organization and Nature of Operations link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 2 - Basis of Presentation and Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 3 - Acquisitions and Divestitures link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 4 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 5 - Derivative Financial Instruments link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 6 - Exploratory/Extension Well Costs link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 7 - Long-term Debt link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 8 - Asset Retirement Obligations link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 9 - Incentive Plans link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 10 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 11 - Major Customers link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 12 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 13 - Earnings Per Share link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 14 - Stockholders' Equity link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 15 - Subsequent Events link:calculationLink link:definitionLink link:presentationLink 995445 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995446 - Disclosure - Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Tables) link:calculationLink link:definitionLink link:presentationLink 995447 - Disclosure - Note 4 - Fair Value Measurements (Tables) link:calculationLink link:definitionLink link:presentationLink 995448 - Disclosure - Note 5 - Derivative Financial Instruments (Tables) link:calculationLink link:definitionLink link:presentationLink 995449 - Disclosure - Note 6 - Exploratory/Extension Well Costs (Tables) link:calculationLink link:definitionLink link:presentationLink 995450 - Disclosure - Note 7 - Long-term Debt (Tables) link:calculationLink link:definitionLink link:presentationLink 995451 - Disclosure - Note 8 - Asset Retirement Obligations (Tables) link:calculationLink link:definitionLink link:presentationLink 995452 - Disclosure - Note 9 - Incentive Plans (Tables) link:calculationLink link:definitionLink link:presentationLink 995453 - Disclosure - Note 10 - Commitments and Contingencies (Tables) link:calculationLink link:definitionLink link:presentationLink 995454 - Disclosure - Note 12 - Income Taxes (Tables) link:calculationLink link:definitionLink link:presentationLink 995455 - Disclosure - Note 13 - Earnings Per Share (Tables) link:calculationLink link:definitionLink link:presentationLink 995456 - Disclosure - Note 15 - Subsequent Events (Tables) link:calculationLink link:definitionLink link:presentationLink 995457 - Disclosure - Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995458 - Disclosure - Note 2 - Basis of Presentation and Summary of Significant Accounting Policies - Other Property and Equipment, Net (Details) link:calculationLink link:definitionLink link:presentationLink 995459 - Disclosure - Note 2 - Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Reportable Segments (Details) link:calculationLink link:definitionLink link:presentationLink 995460 - Disclosure - Note 3 - Acquisitions and Divestitures (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995461 - Disclosure - Note 4 - Fair Value Measurements - Assets and Liabilities Measured On Recurring Basis (Details) link:calculationLink link:definitionLink link:presentationLink 995462 - Disclosure - Note 5 - Derivative Financial Instruments - Summary of the Effect of Derivatives on the Condensed Consolidated Statements of Operations (Details) link:calculationLink link:definitionLink link:presentationLink 995463 - Disclosure - Note 5 - Derivative Financial Instruments - Price Risk Derivative Contracts (Details) link:calculationLink link:definitionLink link:presentationLink 995464 - Disclosure - Note 5 - Derivative Financial Instruments - Net Derivative Liabilities By Counterparty (Details) link:calculationLink link:definitionLink link:presentationLink 995465 - Disclosure - Note 6 - Exploratory/Extension Well Costs (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995466 - Disclosure - Note 6 - Exploratory/Extension Well Costs - Exploratory Well Costs (Details) link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note 7 - Long-term Debt (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note 7 - Long-term Debt - Long-term Debt (Details) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 8 - Asset Retirement Obligations - Asset Retirement Obligations Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 9 - Incentive Plans (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 9 - Incentive Plans - Number of Shares Available for Grant Pursuant to Long-term Incentive Plan (Details) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 9 - Incentive Plans - Stock Options Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 10 - Commitments and Contingencies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 10 - Commitments and Contingencies - Operating Lease Obligations (Details) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 11 - Major Customers (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 12 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 12 - Income Taxes - Income Tax Benefit and Effective Tax Rate (Details) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 12 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 12 - Income Taxes - Deferred Tax Assets and Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 13 - Earnings Per Share - Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Details) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 14 - Stockholders' Equity (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note 15 - Subsequent Events (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note 15 - Subsequent Events - Schedule of Natural Gas Derivatives (Details) link:calculationLink link:definitionLink link:presentationLink