Commitments and Contingencies - Narrative (Details)			1 Months Ended		12 Months Ended
	May 10, 2017 USD ($) t $ / d	Oct. 15, 2015 USD ($)	Jan. 31, 2018 USD ($)	Oct. 31, 2014 t $ / d	Dec. 31, 2017 USD ($) t	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 29, 2017 USD ($)	Dec. 19, 2017 USD ($)	Jun. 28, 2017 USD ($)	Apr. 28, 2017 t
Operating Leased Assets [Line Items]
Rent expense					$ 666,320	$ 840,303	$ 2,591,489
Restricted cash					$ 74,917	74,917
Carrying capacity (in dead weight tonnage) | t					2,683,751
Ultraco Debt Facility
Operating Leased Assets [Line Items]
Draw down amount					$ 61,200,000	$ 0	0
Ultraco Lenders | Ultraco Debt Facility
Operating Leased Assets [Line Items]
Deposit paid on purchase of vessel					2,200,000
Draw down amount					$ 61,200,000
Ultraco Lenders | Ultraco Debt Facility | Eagle Bulk Ultraco LLC
Operating Leased Assets [Line Items]
Increase in commitments maximum amount								$ 8,600,000		$ 61,200,000
Japanese Vessel
Operating Leased Assets [Line Items]
Carrying capacity (in dead weight tonnage) | t				37,000
Term of charter agreement				7 years
Charters agreement extension option				1 year
Vessel agreement termination fee	$ 1,500,000
Japanese Vessel | First Seven Years
Operating Leased Assets [Line Items]
Vessel hire rate | $ / d				13,500
Japanese Vessel | Eighth Year Option
Operating Leased Assets [Line Items]
Vessel hire rate | $ / d				13,750
2013 Built Japanese Vessel
Operating Leased Assets [Line Items]
Carrying capacity (in dead weight tonnage) | t	61,400										61,400
Term of charter agreement	4 years				4 years
Charters agreement extension option	2 years				2 years
2013 Built Japanese Vessel | First Four Years
Operating Leased Assets [Line Items]
Vessel hire rate | $ / d	12,800
2013 Built Japanese Vessel | First Optional Year
Operating Leased Assets [Line Items]
Vessel hire rate | $ / d	13,800
2013 Built Japanese Vessel | Second Optional Year
Operating Leased Assets [Line Items]
Vessel hire rate | $ / d	14,300
2015 Built Ultramax Vessel
Operating Leased Assets [Line Items]
Vessel purchase price									$ 21,275,000
Deposit paid on purchase of vessel					$ 2,200,000
Letter of Credit
Operating Leased Assets [Line Items]
Restricted cash		$ 74,917
Subsequent Event | Ultraco Lenders | Ultraco Debt Facility
Operating Leased Assets [Line Items]
Draw down amount			$ 8,600,000
Lease Agreement for Office Space in Stamford
Operating Leased Assets [Line Items]
Average Annual Rent Expense		$ 419,536
Lease Agreement for New York Office Space
Operating Leased Assets [Line Items]
Early termination fee							$ 1,334,301