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Transactions with Related Parties, The Managers (Details)			12 Months Ended	17 Months Ended
	May 29, 2018 USD ($) extension	May 29, 2018 EUR (€) extension	Dec. 31, 2019 USD ($)	May 28, 2018 USD ($)	Dec. 31, 2018 USD ($)
Related Party Transactions [Abstract]
Management agreement term	3 years	3 years
Management agreement, number of extensions | extension	2	2
Management Agreement, Extension Terms	3 years	3 years
Ship management fee, per day, per vessel		€ 875		$ 975
Flat ship management fee | €		€ 3,000,000
Supervision fee	$ 550,000
Description of related party transaction			50% is payable upon the signing of the relevant supervision agreement, and 50% is payable upon successful completion of the sea trials of each newbuild
Sales fee			1.00%
Related Party Transaction, Due from (to) Related Party, Current [Abstract]
Due from manager			$ 558,000		$ 599,000
Due to manager			$ 9,000		$ 23,000

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Management Agreement Percentage Commission On Sale

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Management Agreement Ship Management Fee Per Day Per Vessel

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Supervision fee payable to the Manager, in exchange for on-site supervision services with respect to all new builds, of which 50% is payable upon the signing of the relevant Supervision Agreement, and 50% upon successful completion of the sea trials of each new build.

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Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

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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).

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A description of the related party transaction, including transactions to which no amounts or nominal amounts were ascribed and such other information deemed necessary to an understanding of the effects of the transactions on the financial statements. Examples of common related party transactions are, sales, purchases and transfers of realty and personal property, services received or furnished, loans and leases to and from top management and affiliates.

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