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MARGIN ACCOUNTS, DERIVATIVES AND FAIR VALUE MEASURES - Fair Value Hierarchy (Details) - Recurring - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Margin accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	$ 1,820,657	$ 912,981
Fuel swap contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)		377,273
Forward freight agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	(59,940)	265,768
Level 1 | Margin accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	1,820,657	912,981
Level 2 | Fuel swap contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)		377,273
Level 2 | Forward freight agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	(59,940)	265,768
Fuel | Fuel swap contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	(3,165,967)	$ 377,000
Fuel | Level 2 | Fuel swap contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	$ (3,165,967)

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