Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Fair value of asset after deduction of liability.

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The cash outflow for derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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Derivative Instruments and Fair Value Measurements - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended
	Jan. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized loss (gain) on derivative instruments		$ 2,917,094	$ (2,289,786)
Purchase of derivative instrument		628,000	0
Freight forward agreements
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative gain (loss)		14,000	440,000
Fuel swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative gain (loss)		(2,551,000)	$ 2,729,000
Recurring \| Freight forward agreements
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value, net assets (liabilities)		(135,630)		$ (149,760)
Recurring \| Fuel swaps \| Fuel
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value, net assets (liabilities)		(2,873,625)		(322,313)
Level 2 \| Recurring \| Freight forward agreements
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value, net assets (liabilities)		(135,630)		(149,760)
Level 2 \| Recurring \| Fuel swaps \| Fuel
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value, net assets (liabilities)		(2,873,625)		$ (322,313)
Interest Rate Cap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized loss (gain) on derivative instruments		$ 379,910
Purchase of derivative instrument	$ 628,000