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Note 10 - Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Note 10 - Commitments and Contingencies (Details) [Line Items]  
Commitments for Vessel Aquisitions $ 130,668
Commitments for Vessel Aquisitions Remainder of Fiscal Year 12,840
Commitments for Vessel Aquisitions Second Year 51,433
Commitments for Vessel Aquisitions Third Year 66,395
Hull S407 [Member]
  
Note 10 - Commitments and Contingencies (Details) [Line Items]  
Commitments for Vessel Aquisitions 22,138
Hull S418 [Member]
  
Note 10 - Commitments and Contingencies (Details) [Line Items]  
Commitments for Vessel Aquisitions 28,170
Hull S419 [Member]
  
Note 10 - Commitments and Contingencies (Details) [Line Items]  
Commitments for Vessel Aquisitions 28,170
Hull S414 [Member]
  
Note 10 - Commitments and Contingencies (Details) [Line Items]  
Commitments for Vessel Aquisitions 26,010
Hull S417 [Member]
  
Note 10 - Commitments and Contingencies (Details) [Line Items]  
Commitments for Vessel Aquisitions $ 26,180