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Long-term Debt (Narrative III) (Details) |  |  |  | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 06, 2023 USD ($) | Apr. 19, 2023 USD ($) | Jan. 04, 2017 USD ($) | Jun. 30, 2024 USD ($) Installments Item | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Jun. 26, 2023 USD ($) | Apr. 12, 2023 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  | $ 0 | $ (748,000) |  |  |
Gain from interest rate swap |  |  |  | $ 361,000 | $ 0 |  |  |
Number of loan agreement refinanced | Item |  |  |  | 2 |  |  |  |
Export-Import Bank of China [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of secured debt |  |  | $ 57,240,000 |  |  |  |  |
Frequency period |  |  |  | quarterly |  |  |  |
Debt, principal payments |  |  |  | $ 954,000 |  |  |  |
Debt instrument, maturity date |  |  |  | Jan. 04, 2032 |  |  |  |
Export-Import Bank of China [Member] | Secured Debt [Member] | SOFR [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument Basis Spread On Variable Rate1 |  |  |  | 2.45% |  |  |  |
DNB Bank ASA [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Number of installments | Item |  |  |  | 26 |  |  |  |
Frequency period |  |  |  | quarterly |  |  |  |
Debt, principal payments |  |  |  | $ 3,846,000 |  |  |  |
Debt instrument, maturity date |  |  |  | Dec. 27, 2029 |  |  |  |
Notional amount | $ 30,000,000 |  |  |  |  |  |  |
Notional amount, percent of loan | 30.00% |  |  |  |  |  |  |
Quarterly amortization amount | $ 1,154,000 |  |  |  |  |  |  |
Fixed interest rate related to the interest rate derivative | 4.268% |  |  |  |  |  |  |
Interest rate swap, fair value |  |  |  | $ 78,000 |  | $ 439,000 |  |
Gain from interest rate swap |  |  |  | $ 361,000 |  |  |  |
Loan amount |  |  |  |  |  |  | $ 100,000,000 |
DNB Bank ASA [Member] | Secured Debt [Member] | SOFR [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument Basis Spread On Variable Rate1 |  |  |  | 2.20% |  |  |  |
Danish Ship Finance A/S |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of secured debt |  | $ 100,000,000 |  |  |  |  |  |
Debt Instrument, Number of installments | Installments |  |  |  | 20 |  |  |  |
Frequency period |  |  |  | quarterly |  |  |  |
Debt, principal payments |  |  |  | $ 3,301,000 |  |  |  |
Debt Instrument, Balloon Payment |  |  |  | $ 33,972,000 |  |  |  |
Loan amount |  |  |  |  |  |  |  | $ 100,000,000
Danish Ship Finance A/S | Secured Debt [Member] | SOFR [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument Basis Spread On Variable Rate1 |  |  |  | 2.20% |  |  |  |

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