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v3.21.1

Subsequent Events (Details Narrative) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 22, 2021 USD ($) | Mar. 17, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Mar. 16, 2021 USD ($) shares | Mar. 03, 2021 | Feb. 02, 2021 $ / shares shares
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  | $ 72,059,000 | $ 347,140,000 | $ 328,634,000 |  |  |
Kamsarmax Vessels [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Additions |  | $ 55,000,000 |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  | $ 11,000,000.0 |  |  |  |  |  |
Subsequent Event [Member] | Eneti Warrant [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Common Stock, Shares Authorized | shares |  |  |  |  |  |  |  | 3,000,000
Exercise price | $ / shares |  |  |  |  |  |  |  | $ 0.01
Common Stock, Shares, Issued | shares |  |  |  |  |  | 2,649,203 |  |
Subsequent Event [Member] | Eneti Warrant [Member] | Remaining Common Stock Shares To Be Issued [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Common Stock, Shares, Issued | shares |  |  |  |  |  | 350,797 |  |
Subsequent Event [Member] | Eneti Acquisition Vessels [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Number of operating vessels |  |  |  |  |  |  |  | 7
Subsequent Event [Member] | Eneti Acquisition Vessels [Member] | Eneti Inc [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract |  |  |  |  |  |  |  | 5 years
Subsequent Event [Member] | Six Vessels [Member] | Eneti Warrant [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Finance Lease, Liability |  |  |  |  |  | $ 86,900,000 |  |
Subsequent Event [Member] | Six Vessels [Member] | Eneti Warrant [Member] | Remaining Common Stock Shares To Be Issued [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Finance Lease, Liability |  |  |  |  |  | $ 12,700,000 |  |
Subsequent Event [Member] | Kamsarmax Vessels [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Vessel capacity |  |  |  |  |  |  | 82,000 |
Subsequent Event [Member] | SEB $39,000 Facility [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Initiation Date | Jan. 22, 2021 |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 39,000,000 |  |  |  |  |  |  |
Debt Instrument, Term | 5 years |  |  |  |  |  |  |
Line of Credit Facility, Collateral | is secured by first priority mortgages on the three aforementioned vessels |  |  |  |  |  |  |

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