Related Party Transactions - Amounts and Notes Payable to Related Parties (Details)	3 Months Ended
Mar. 31, 2020 USD ($)
Schedule of Related Party Payables
Beginning balance	$ 332,987
Ending balance	242,852
Included in current related party debt on the consolidated balance sheets
Schedule of Related Party Payables
Beginning balance	332,987
Activity	(90,135)
Ending balance	$ 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
Beginning balance	$ 457,629
Activity	0
Ending balance	457,629
Affiliated companies (trade payables) \| Included in accounts payable, accrued expenses and other current liabilities on the consolidated balance sheets
Schedule of Related Party Payables
Beginning balance	5,679,768
Activity	744,554
Ending balance	6,424,322
Interest payable - 2011 Founders Note \| Included in current related party debt on the consolidated balance sheets \| Loans payable
Schedule of Related Party Payables
Beginning balance	332,987
Activity	(90,135)
Ending balance	$ 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

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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
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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
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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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