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Note 2 - Significant Accounting Policies (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Note 2 - Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Foreign Currency Transaction Loss, before Tax |  |  | $ 0 | $ 48 |
Provision for Doubtful Accounts |  |  |  | 256 |
Other Employee Related Liabilities, Current |  |  | 4 | 11 |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) | 21,034 | 22,106 | 21,034 | 22,106 | 25,749
Number of Reportable Segments |  |  | 1 |  |
Vessels [Member] |  |  |  |  |
Note 2 - Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 25 years |  |
Trade Accounts Receivable [Member] |  |  |  |  |
Note 2 - Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Provision for Doubtful Accounts |  |  | $ 574 | $ 576 |
Chief Executive Officer [Member] |  |  |  |  |
Note 2 - Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) | 21,034 |  | 21,034 |  |
Minimum [Member] |  |  |  |  |
Note 2 - Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Commission Paid as a Percentage of Daily Charter Hire Rate |  |  | 1.25% |  |
Related Parties Beneficial Ownership Percentage |  |  | 10.00% |  |
Maximum [Member] |  |  |  |  |
Note 2 - Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Commission Paid as a Percentage of Daily Charter Hire Rate |  |  | 3.10% |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 + Details
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