000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Unaudited Condensed Consolidated Balance Sheets link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Unaudited Condensed Consolidated Balance Sheets (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Unaudited Condensed Consolidated Statements of Operations link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Unaudited Condensed Consolidated Statements of Changes in Shareholders' Equity link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Unaudited Condensed Consolidated Statements of Changes in Shareholders' Equity (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 006 - Statement - Unaudited Condensed Consolidated Statements of Cash Flows link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 1 - Organization, Operations and Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 2 - Acquisitions and Divestitures link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 3 - Revenue Recognition link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 4 - Leases link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 5 - Oil and Natural Gas Producing Activities link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 6 - Credit Facility link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 7 - Commodity Derivatives link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 8 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 9 - Shareholders' Equity link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 10 - Asset Retirement Obligations link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 11 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 12 - Income (Loss) Per Share link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 13 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 15 - Supplemental Disclosures of Cash Flow Information link:calculationLink link:definitionLink link:presentationLink 022 - Disclosure - Note 16 - Subsequent Events link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 3 - Revenue Recognition (Tables) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 4 - Leases (Tables) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 6 - Credit Facility (Tables) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 9 - Shareholders' Equity (Tables) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 10 - Asset Retirement Obligations (Tables) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 12 - Income (Loss) Per Share (Tables) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities (Tables) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 15 - Supplemental Disclosures of Cash Flow Information (Tables) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 1 - Organization, Operations and Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 2 - Acquisitions and Divestitures (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 3 - Revenue Recognition (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note 3 - Revenue Recognition - Schedule of Concentration Risk (Details) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note 4 - Leases - Lease Cost (Details) link:calculationLink link:definitionLink link:presentationLink 995484 - Disclosure - Note 4 - Leases - Schedule of Operating Lease Maturity (Details) link:calculationLink link:definitionLink link:presentationLink 995485 - Disclosure - Note 5 - Oil and Natural Gas Producing Activities (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995486 - Disclosure - Note 6 - Credit Facility (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995487 - Disclosure - Note 6 - Credit Facility - Schedule of Debt (Details) link:calculationLink link:definitionLink link:presentationLink 995488 - Disclosure - Note 7 - Commodity Derivatives (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995489 - Disclosure - Note 9 - Shareholders' Equity (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995490 - Disclosure - Note 9 - Shareholders' Equity - Valuation Assumptions (Details) link:calculationLink link:definitionLink link:presentationLink 995491 - Disclosure - Note 9 - Shareholders' Equity - Restricted Stock Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995492 - Disclosure - Note 9 - Shareholders' Equity - Activity in Share Repurchase Program (Details) link:calculationLink link:definitionLink link:presentationLink 995493 - Disclosure - Note 10 - Asset Retirement Obligations (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995494 - Disclosure - Note 10 - Asset Retirement Obligations - Schedule of Asset Retirement Obligations (Details) link:calculationLink link:definitionLink link:presentationLink 995495 - Disclosure - Note 11 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995496 - Disclosure - Note 12 - Income (Loss) Per Share - Schedule of Loss Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 995497 - Disclosure - Note 13 - Fair Value Measurements (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995498 - Disclosure - Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities - Schedule of Other Current Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995499 - Disclosure - Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities - Schedule of Accounts Payable and Accrued Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995500 - Disclosure - Note 15 - Supplemental Disclosures of Cash Flow Information - Supplemental Disclosures of Cash Flow Information (Details) link:calculationLink link:definitionLink link:presentationLink 995501 - Disclosure - Note 16 - Subsequent Events (Details Textual) link:calculationLink link:definitionLink link:presentationLink