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Debt - Ultraco Debt Facility (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 28, 2017
USD ($)
vessel
Feb. 28, 2017
USD ($)
Mar. 30, 2016
Jan. 31, 2018
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
vessel
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 29, 2017
USD ($)
Debt Instrument [Line Items]                  
Basis spread on variable rate     4.00%            
Repayments of long-term debt               $ 13,021,000  
Ultraco Debt Facility                  
Debt Instrument [Line Items]                  
Proceeds from issuance of long-term debt           $ 8,600,000 $ 0    
Ultraco Lenders | Ultraco Debt Facility                  
Debt Instrument [Line Items]                  
Payments of financing costs       $ 100,000          
Proceeds from issuance of long-term debt       $ 8,600,000   $ 69,800,000      
Deposits on vessel purchases               $ 2,200,000  
Eagle Bulk Ultraco LLC | Ultraco Lenders | Ultraco Debt Facility                  
Debt Instrument [Line Items]                  
Secured term loan aggregate principal maximum amount $ 61,200,000                
Maximum percentage borrowing capacity of vessels to be acquired 40.00%                
Number of vessels to be purchased | vessel 9         10      
Repayments of long-term debt   $ 918,000              
Payments of financing costs   $ 459,735              
Debt instrument, term 5 years                
Ultraco additional borrowing capacity $ 30,200,000                
Ultraco maximum percentage borrowing capacity of additional vessels to be financed 40.00%                
Aggregate market value minimum threshold 150.00%                
Ultraco facility liquidity reserve $ 600,000                
Ultraco facility debt service reserve 600,000                
Minimum liquidity threshold $ 7,500,000.0                
Percentage of consolidated total debt minimum threshold 12.00%                
Minimum ratio of consolidated tangible assets to consolidated total assets covenant 0.35                
Ballast water treatment system reserve $ 4,550,000                
Increase in commitments                 $ 8,600,000
Eagle Bulk Ultraco LLC | Ultraco Lenders | Ultraco Debt Facility | Minimum                  
Debt Instrument [Line Items]                  
Interest coverage ratio 2.00                
Eagle Bulk Ultraco LLC | Ultraco Lenders | Ultraco Debt Facility | Maximum                  
Debt Instrument [Line Items]                  
Interest coverage ratio 2.50                
Eagle Bulk Ultraco LLC | Ultraco Lenders | Ultraco Debt Facility | Forecast                  
Debt Instrument [Line Items]                  
Periodic principal payment         $ 1,787,571        
Eagle Bulk Ultraco LLC | Ultraco Lenders | Ultraco Debt Facility | LIBOR                  
Debt Instrument [Line Items]                  
Basis spread on variable rate   2.95%