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Accrued Liabilities - Schedule of Accrued Liabilities (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Accrued Liabilities [Abstract]
Interest on long-term debt	$ 2,790,621	$ 3,656,811
Administrative expenses	205,184	251,257
Other operating costs		660,000
Vessel operating and voyage expenses	3,006,274	2,311,420
Total	$ 6,002,079	$ 6,879,488

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Accrued administrative expenses current.

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Schedule Of Accrued Liabilities [Abstract]

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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