Related Party Transactions - Amounts and Notes Payable to Related Parties (Details)	6 Months Ended
Jun. 30, 2020 USD ($)
Schedule of Related Party Payables
December 31, 2019	$ 332,987
June 30, 2020	242,852
Included in current related party debt on the consolidated balance sheets
Schedule of Related Party Payables
December 31, 2019	332,987
Activity	(90,135)
June 30, 2020	$ 242,852
Trade receivables due from King George Slag \| Included in trade accounts receivable and voyage revenue on the consolidated balance sheets and statements of income, respectively
Related Party Transaction [Line Items]
Ownership percentage	25.00%
Schedule of Related Party Payables
December 31, 2019	$ 457,629
Activity	(129,999)
June 30, 2020	327,630
Affiliated companies (trade payables) \| Included in accounts payable, accrued expenses and other current liabilities on the consolidated balance sheets
Schedule of Related Party Payables
December 31, 2019	5,679,768
Activity	1,233,527
June 30, 2020	6,913,295
Interest payable - 2011 Founders Note \| Included in current related party debt on the consolidated balance sheets \| Loans payable
Schedule of Related Party Payables
December 31, 2019	332,987
Activity	(90,135)
June 30, 2020	$ 242,852

Schedule of Related Party [Roll Forward]

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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.19(a))
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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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- Definition

Amount of cash inflow (outflow) from long-term debt by a related party. Related parties, include, but are not limited to, affiliates, owners or officers and their immediate families, and pension trusts.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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