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Note 1 - Basis of Presentation and General Information (Details Textual)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 07, 2016
$ / shares
Aug. 10, 2016
USD ($)
$ / shares
shares
Aug. 05, 2016
Mar. 30, 2016
Oct. 02, 2015
t
Jul. 31, 2016
t
May 31, 2016
t
Sep. 30, 2016
USD ($)
t
Sep. 30, 2016
USD ($)
t
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Supramax Vessels [Member]                      
Vessels In Operation               39 39    
Handymax Vessels [Member]                      
Vessels In Operation               1 1    
Newbulding Vessel [Member] | Minimum [Member]                      
Charters Agreement Term           330 days 270 days        
Newbulding Vessel [Member] | Maximum [Member]                      
Charters Agreement Term           1 year 30 days 1 year 60 days        
Newbulding Vessel [Member]                      
Dead Weight Tonnage of Operating Fleet | t         38,000 61,000 63,000        
Cost Reclassification from Vessel Expenses to General and Administrative Expenses [Member] | Three Months Ended September 30, 2015 [Member]                      
Prior Period Reclassification Adjustment               $ 1,400,000      
Cost Reclassification from Vessel Expenses to General and Administrative Expenses [Member] | Nine Months Ended September 30, 2015 [Member]                      
Prior Period Reclassification Adjustment                 $ 4,500,000    
December 31, 2015 [Member] | Reclassification of Deferred Financing Costs to Reduction of Long-term Debt [Member]                      
Prior Period Reclassification Adjustment                     $ 435,816
Reverse Stock Split [Member]                      
Stockholders' Equity Note, Stock Split, Conversion Ratio     20                
Series A Preferred Stock [Member]                      
Preferred Stock, Dividend Rate, Percentage 15.00%                    
Preferred Stock, Par or Stated Value Per Share | $ / shares $ 0.01                    
Other Expense [Member]                      
Termination Payment, Amount               $ 125,254.80 $ 125,254.80    
Vessels In Operation               40 40    
Dead Weight Tonnage of Operating Fleet | t               2,199,413 2,199,413    
Average Age in Years of Operating Fleet                 8 years 219 days    
Charters Agreement Term       1 year 180 days 7 years            
Proceeds from Issuance of Common Stock   $ 86,000,000             $ 85,700,535  
Stock Issued During Period, Shares, New Issues | shares   29,333,318                  
Share Price | $ / shares   $ 3