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Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) (USD $)
Sep. 30, 2013
Sep. 27, 2013
Sep. 25, 2013
Sep. 11, 2013
Aug. 31, 2013
Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) [Line Items]          
Number of Vessels Under Construction 15 2 2 1 4
Advances for vessels under construction and acquisitions $ 26,521,200        
Hull S514 And Hull S515 [Member]
          
Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) [Line Items]          
Number of Vessels Under Construction 2        
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds 50,000,000        
Advances for vessels under construction and acquisitions 12,500,000        
Four LPG Carriers [Member]
          
Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) [Line Items]          
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds         62,316,400
Advances for vessels under construction and acquisitions $ 14,021,200