Debt (Details Textual)														9 Months Ended	24 Months Ended
	Jun. 14, 2017 USD ($)	Apr. 19, 2017	Dec. 21, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 19, 2016 USD ($) installment	May 27, 2016 USD ($) installment	Dec. 11, 2015 USD ($) installment	Sep. 28, 2015 USD ($) installment	May 22, 2015 USD ($)	Mar. 07, 2014 USD ($) tranche installment	May 31, 2013 USD ($) installment	Feb. 18, 2013 USD ($) installment	Apr. 30, 2012 USD ($) installment	Sep. 30, 2017 USD ($)	Feb. 18, 2015 USD ($)	Apr. 27, 2017	Mar. 31, 2017	Mar. 27, 2017	Jan. 31, 2017	Dec. 28, 2016	Nov. 30, 2014 USD ($)	Jan. 23, 2014 USD ($)	Apr. 30, 2013 USD ($)	Sep. 30, 2011 USD ($)	Dec. 31, 2009 USD ($)
Secured Debt [Member] | Bulk Pangaea Secured Note [Member]
Debt Instrument [Line Items]
Face amount																									$ 12,250,000
Periodic payment terms, balloon payment to be Paid																							$ 1,040,625
Secured Debt [Member] | Bulk Patriot Secured Note [Member]
Debt Instrument [Line Items]
Face amount																								$ 12,000,000
Periodic payment terms, balloon payment to be Paid																							$ 1,087,500
Secured Debt [Member] | Bulk Trident Secured Note [Member]
Debt Instrument [Line Items]
Face amount													$ 10,200,000
Interest rate, stated percentage																							4.29%
Periodic payment terms, balloon payment to be Paid													1,462,500
Basis spread on variable rate		3.50%
Debt Instrument, Interest Rate, Effective Percentage														4.78%
Secured Debt [Member] | Bulk Juliana Secured Note [Member]
Debt Instrument [Line Items]
Face amount													$ 8,112,500
Interest rate, stated percentage																							4.38%
Number of periodic payments | installment													6
Periodic payment, principal													$ 507,031
Secured Debt [Member] | Bulk Phoenix Secured Note [Member]
Debt Instrument [Line Items]
Face amount											$ 10,000,000
Interest rate, stated percentage				5.09%
Periodic payment terms, balloon payment to be Paid											$ 1,816,659
Secured Debt [Member] | Bulk Phoenix Secured Note [Member] | Seven Equal Quarterly Installments [Member]
Debt Instrument [Line Items]
Number of periodic payments | installment											7
Periodic payment, principal											$ 442,858
Secured Debt [Member] | Bulk Phoenix Secured Note [Member] | two quarterly installments [Member]
Debt Instrument [Line Items]
Number of periodic payments | installment											2
Periodic payment, principal											$ 700,000
Secured Debt [Member] | Bulk Atlantic Secured Note [Member]
Debt Instrument [Line Items]
Face amount												$ 8,520,000
Number of periodic payments | installment												8
Periodic payment, principal															$ 90,000
Periodic payment terms, balloon payment to be Paid												$ 4,170,000
Secured Debt [Member] | Bulk Atlantic Secured Note [Member] | first and second installment [Member]
Debt Instrument [Line Items]
Periodic payment, principal													650,000
Secured Debt [Member] | Bulk Atlantic Secured Note [Member] | Twelve Equal Quarterly Installments [Member]
Debt Instrument [Line Items]
Number of periodic payments | installment												12
Periodic payment, principal															$ 295,000
Secured Debt [Member] | Bulk Atlantic Secured Note [Member] | third and fourth installment [Member]
Debt Instrument [Line Items]
Periodic payment, principal													435,000
Secured Debt [Member] | Bulk Atlantic Secured Note [Member] | fifth and sixth installment [Member]
Debt Instrument [Line Items]
Periodic payment, principal													327,500
Secured Debt [Member] | Bulk Atlantic Secured Note [Member] | seventh, eighth, and ninth installment [Member]
Debt Instrument [Line Items]
Periodic payment, principal													$ 300,000
Secured Debt [Member] | Bulk Nordic Oasis Ltd. Loan Agreement [Member]
Debt Instrument [Line Items]
Face amount							$ 21,500,000
Interest rate, stated percentage																				4.30%
Periodic payment, principal							375,000
Periodic payment terms, balloon payment to be Paid							$ 12,500,000
Secured Debt [Member] | mv Nordic Bulk Oasis [Member]
Debt Instrument [Line Items]
Number of periodic payments | installment							24
Secured Debt [Member] | Nordic Bulk Barents Ltd. and Nordic Bulk Bothnia Ltd [Member]
Debt Instrument [Line Items]
Face amount										$ 13,000,000
Periodic payment terms, balloon payment to be Paid										$ 1,755,415
Debt payment terms										In addition, any cash in excess of $750,000 per borrower on any repayment date shall be applied toward prepayment of the relevant loan in inverse order, so the balloon payment is prepaid first.
Basis spread on variable rate										2.50%
Debt Instrument, Interest Rate, Effective Percentage														3.80%
Number of tranches | tranche										2
Payment terms										$ 750,000
Secured Debt [Member] | Nordic Bulk Barents Ltd. and Nordic Bulk Bothnia Ltd [Member] | Twenty Two Equal Quarterly Installments Per Borrower [Member]
Debt Instrument [Line Items]
Number of periodic payments | installment										22
Periodic payment, principal										$ 163,045
Secured Debt [Member] | Nordic Bulk Barents Ltd. and Nordic Bulk Bothnia Ltd [Member] | One Installment Per Borrower [Member]
Debt Instrument [Line Items]
Periodic payment, principal										163,010
Secured Debt [Member] | Nordic Bulk Bothina Ltd. [Member]
Debt Instrument [Line Items]
Long-term line of credit																						$ 6,500,000
Secured Debt [Member] | Nordic Bulk Barents Ltd. [Member]
Debt Instrument [Line Items]
Long-term line of credit										$ 6,500,000
Secured Debt [Member] | Bulk Nordic Six Ltd. Loan Agreement [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage																		4.74%
Secured Debt [Member] | Bulk Freedom Loan Agreement [Member]
Debt Instrument [Line Items]
Face amount	$ 5,500,000
Periodic payment terms, balloon payment to be Paid	$ 2,300,000
Basis spread on variable rate			3.75%
Debt Instrument, Interest Rate, Effective Percentage														5.05%
Secured Debt [Member] | Bulk Freedom Loan Agreement [Member] | Twelve Equal Quarterly Installments [Member]
Debt Instrument [Line Items]
Number of periodic payments	12
Periodic payment, principal	$ 150,000
Secured Debt [Member] | Bulk Freedom Loan Agreement [Member] | Eight Equal Quarterly Installments [Member]
Debt Instrument [Line Items]
Number of periodic payments	8
Periodic payment, principal	$ 175,000
Secured Debt [Member] | Bulk Endurance Senior Tranche Loan [Member]
Debt Instrument [Line Items]
Face amount			$ 16,000,000
Secured Debt [Member] | 109 Long Wharf Commercial Term Loan [Member]
Debt Instrument [Line Items]
Face amount						$ 1,096,000
Number of periodic payments | installment						120
Periodic payment, principal						$ 9,133
Basis spread on variable rate						2.00%
Debt Instrument, Interest Rate, Effective Percentage														3.30%
Secured Debt [Member] | PBC US LLC Automobile Loan [Member]
Debt Instrument [Line Items]
Face amount					$ 29,435
Interest rate, stated percentage					3.74%
Number of periodic payments | installment					60
Periodic payment, principal					$ 539
Secured Debt [Member] | PBC US LLC Master Loan [Member]
Debt Instrument [Line Items]
Face amount				$ 250,536
Interest rate, stated percentage				4.75%
Number of periodic payments				48
Periodic payment, principal				$ 5,741
mv NORDIC ODIN [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Face amount								$ 21,750,000
mv NORDIC ODIN [Member] | Secured Debt [Member] | Bulk Nordic Odin, Bulk Nordic Olympic, Bulk Nordic Odyssey, Bulk Nordic Orion and Bulk Nordic Oshima Loan Agreement [Member] [Domain]
Debt Instrument [Line Items]
Interest rate, stated percentage																4.07%			3.95%
Number of periodic payments | installment								28
Periodic payment, principal								$ 375,000
Periodic payment terms, balloon payment to be Paid								$ 11,233,150
Debt Instrument, Interest Rate, Portion Fixed																			50.00%
mv NORDIC ODIN [Member] | Secured Debt [Member] | Bulk Nordic Odyssey, Bulk Nordic Orion and Bulk Nordic Oshima Debt Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate								2.00%
Odyssey And Orion [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Face amount								$ 13,500,000
Odyssey And Orion [Member] | Secured Debt [Member] | Bulk Nordic Odin, Bulk Nordic Olympic, Bulk Nordic Odyssey, Bulk Nordic Orion and Bulk Nordic Oshima Loan Agreement [Member] [Domain]
Debt Instrument [Line Items]
Interest rate, stated percentage																	4.24%
Number of periodic payments | installment								20
Periodic payment, principal								$ 5,677,203
Periodic payment terms, balloon payment to be Paid								$ 375,000
Debt Instrument, Interest Rate, Portion Fixed																	50.00%
Odyssey And Orion [Member] | Secured Debt [Member] | Bulk Nordic Odyssey, Bulk Nordic Orion and Bulk Nordic Oshima Debt Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate								2.40%
Debt Instrument, Interest Rate, Effective Percentage														3.55%
Nordic Bulk Oshima [Member] | Secured Debt [Member] | Bulk Nordic Odin, Bulk Nordic Olympic, Bulk Nordic Odyssey, Bulk Nordic Orion and Bulk Nordic Oshima Loan Agreement [Member] [Domain]
Debt Instrument [Line Items]
Number of periodic payments | installment								28
Nordic Bulk Oshima [Member] | Secured Debt [Member] | Bulk Nordic Odyssey, Bulk Nordic Orion and Bulk Nordic Oshima Debt Agreement [Member]
Debt Instrument [Line Items]
Periodic payment, principal								$ 375,000
Periodic payment terms, balloon payment to be Paid								$ 11,254,295
Basis spread on variable rate								2.25%
Debt Instrument, Interest Rate, Effective Percentage														3.55%
mv NORDIC OSHIMA [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Face amount								$ 21,000,000
mv NORDIC OSHIMA [Member] | Secured Debt [Member] | Bulk Nordic Odin, Bulk Nordic Olympic, Bulk Nordic Odyssey, Bulk Nordic Orion and Bulk Nordic Oshima Loan Agreement [Member] [Domain]
Debt Instrument [Line Items]
Interest rate, stated percentage																			4.16%
Debt Instrument, Interest Rate, Portion Fixed																			50.00%
Bulk Invest, Ltd. [Member]
Debt Instrument [Line Items]
Face amount																					$ 5,000,000
Interest rate, stated percentage																					5.00%
Repayments of Notes Payable									$ 3,000,000					$ 0
Tranche A [Member] | Secured Debt [Member] | Bulk Nordic Six Ltd. Loan Agreement [Member]
Debt Instrument [Line Items]
Face amount			19,500,000
Periodic payment terms, balloon payment to be Paid			$ 11,667,667
Tranche A [Member] | Secured Debt [Member] | Bulk Nordic Six Ltd. Loan Agreement [Member] | three equal quarterly installments [Member]
Debt Instrument [Line Items]
Number of periodic payments			3
Periodic payment, principal			$ 100,000
Tranche A [Member] | Secured Debt [Member] | Bulk Nordic Six Ltd. Loan Agreement [Member] | seventeen equal quarterly installments [Member]
Debt Instrument [Line Items]
Number of periodic payments			17
Periodic payment, principal			$ 266,667
Tranche B [Member] | Secured Debt [Member] | Bulk Nordic Six Ltd. Loan Agreement [Member]
Debt Instrument [Line Items]
Face amount			$ 3,500,000
Number of periodic payments			18
Periodic payment, principal			$ 65,000
Periodic payment terms, balloon payment to be Paid			$ 2,330,000
Basis spread on variable rate			6.00%
Debt Instrument, Interest Rate, Effective Percentage														7.30%