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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%