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Equity Investments (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 17, 2017	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Jun. 17, 2021
Equity Investment
Payments for equity investments				$ 238	$ 4,998
Common stock		$ 391		391		$ 364
Income (loss) in equity investments		$ (67)		$ 169	0
Anglo Ardmore Ship Management Limited
Equity Investment
Percentage of ownership interest (as a percent)		50.00%		50.00%
Element 1 Corp And Maritime Partners LLC
Equity Investment
Equity Investment							$ 10,900
Element 1 Corp.
Equity Investment
Percentage of ownership interest (as a percent)	10.00%	10.00%		10.00%
Payments for equity investments	$ 4,000		$ 5,000
Common stock	$ 5,300		$ 5,300		$ 5,300
Number of common shares	581,795
Warrants to purchase common shares	286,582
Total investment	$ 9,300	$ 9,300		$ 9,300
Percentage of voting right	20.00%
Equity Investment		$ 9,800		$ 9,800
e1 Marine LLC
Equity Investment
Percentage of ownership interest (as a percent)	33.33%	33.33%		33.33%
Equity Investment		$ 1,100		$ 1,100

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The number of common shares held as equity investment.

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Refers to the voting percentage assigned in an equity investment.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

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This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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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.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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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.

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