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General information (Tables)
12 Months Ended
Dec. 31, 2012
Risks and Uncertainties [Abstract]  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
Charterer 2012 2011 2010
A 46% 73% 51%
B 22%  -  -
C 22%  -  -
D  - 27% 41%