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Note 15 - Voyage, Vessel Operating Expenses and Commissions (Tables)
12 Months Ended
Dec. 31, 2013
Vessel Voyage And Operating Expenses [Abstract]  
Schedule of Voyage, Vessel Operating Expenses, and Commissions
   
Year ended December 31,
 
   
2011
   
2012
   
2013
 
Voyage expenses
                 
Port charges and canal dues
    304,951       442,783       364,091  
Bunkers
    472,951       886,885       1,173,807  
Total
    777,902       1,329,668       1,537,898  
                         
Vessel operating expenses
                       
Crew wages and related costs
    14,137,227       13,864,535       13,921,033  
Insurance
    2,691,918       2,435,144       2,222,912  
Repairs and maintenance
    601,254       511,569       478,197  
Lubricants
    2,712,901       2,846,087       2,836,561  
Spares and consumable stores
    4,590,835       4,083,590       4,204,965  
Professional and legal fees
    111,043       137,047       158,978  
Other
    1,404,161       1,197,167       1,368,604  
Total
    26,249,339       25,075,139       25,191,250  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   
Year ended December 31,
 
   
2011
   
2012
   
2013
 
Third parties
    2,206,663       2,032,599       1,461,915  
Related parties (see Note 9)
    766,304       641,104       474,466  
      2,972,967       2,673,703       1,936,381