Commitments and Contingencies (Details Textual)				9 Months Ended	12 Months Ended
	Jun. 15, 2017 USD ($)	Jan. 07, 2017 USD ($)	Jul. 05, 2016 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2013 vessel
Commitments and Contingencies [Line Items]
Proceeds from Legal Settlements				$ 462,000
rental expense per year under bareboat charter, next 5 years			$ 365,000
Construction Of Two New ultramax newbuildings [Member] | Two Ultramax Vessels [Member]
Commitments and Contingencies [Line Items]
Purchase obligation, number of vessels | vessel					2
mv BULK BEOTHUK [Member]
Commitments and Contingencies [Line Items]
Sale Leaseback Transaction, Lease Terms	The lease is payable at $3,500 per day every fifteen days over the five year lease term
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 4,000,000
Interest rate, stated percentage	11.83%
Capital Leased Assets, Gross	$ 7,000,000			$ 6,920,181
m/v Bulk Destiny [Member]
Commitments and Contingencies [Line Items]
Sale Leaseback Transaction, Proceeds		$ 21,000,000
Sale Leaseback Transaction, Lease Terms		Minimum lease payments fluctuate based on three-month LIBOR and are payable quarterly over the seven year lease term
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid		$ 11,200,000
Debt Instrument, Basis Spread on Variable Rate		2.75%
Debt Instrument, Interest Rate, Effective Percentage		3.85%
Capital Leased Assets, Gross		$ 24,000,000