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 Income (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Condensed Consolidated Statements of Equity (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed 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 - Acquisitions and Dispositions link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Additional Balance Sheet Information link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Long-Term Debt link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Other Long-Term Obligations and Commitments link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Contingent Liabilities link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Stock Options and Other Compensation link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Related Party Transactions link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Fair Value Disclosures link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Derivative Instruments link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Earnings Per Share link:calculationLink link:definitionLink link:presentationLink 995445 - Disclosure - Note 3 - Additional Balance Sheet Information (Tables) link:calculationLink link:definitionLink link:presentationLink 995446 - Disclosure - Note 5 - Other Long-Term Obligations and Commitments (Tables) link:calculationLink link:definitionLink link:presentationLink 995447 - Disclosure - Note 9 - Fair Value Disclosures (Tables) link:calculationLink link:definitionLink link:presentationLink 995448 - Disclosure - Note 10 - Derivative Instruments (Tables) link:calculationLink link:definitionLink link:presentationLink 995449 - Disclosure - Note 11 - Earnings Per Share (Tables) link:calculationLink link:definitionLink link:presentationLink 995450 - Disclosure - Note 2 - Acquisitions and Dispositions (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995451 - Disclosure - Note 3 - Additional Balance Sheet Information - Components of Balance Sheet Amounts (Details) link:calculationLink link:definitionLink link:presentationLink 995452 - Disclosure - Note 4 - Long-Term Debt (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995453 - Disclosure - Note 5 - Other Long-Term Obligations and Commitments (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995454 - Disclosure - Note 5 - Other Long-Term Obligations and Commitments - Schedule of Operating Lease Obligations (Details) link:calculationLink link:definitionLink link:presentationLink 995455 - Disclosure - Note 5 - Other Long-Term Obligations and Commitments - Reconciliation of Liability of Plugging and Abandonment Costs (Details) link:calculationLink link:definitionLink link:presentationLink 995456 - Disclosure - Note 7 - Stock Options and Other Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995457 - Disclosure - Note 8 - Related Party Transactions (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995458 - Disclosure - Note 9 - Fair Value Disclosure - Schedule of Fair Value Measurements on a Recurring Basis (Details) link:calculationLink link:definitionLink link:presentationLink 995459 - Disclosure - Note 10 - Derivative Instrument - Schedule of Financial Statement Location Information (Details) link:calculationLink link:definitionLink link:presentationLink 995460 - Disclosure - Note 10 - Derivative Instrument - Schedule of Oil Derivative Contracts (Details) link:calculationLink link:definitionLink link:presentationLink 995461 - Disclosure - Note 10 - Derivative Instrument - Schedule of Offsetting Derivative Assets and Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995462 - Disclosure - Note 11 - Earnings Per Share - Computation of Basic and Diluted Earnings (Details) link:calculationLink link:definitionLink link:presentationLink