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MARGIN ACCOUNTS, DERIVATIVES AND FAIR VALUE MEASURES - Forward Freight Agreements (Details) - Forward freight agreements - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | $ 326,000 | $ 287,000
Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value, Net Asset (Liability) | $ (59,940) | $ 265,768

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