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Significant Accounting Policies and Recent Accounting Pronouncements (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Accounting Policies Disclosure [Line Items] |  |  |
Accounts receivable, provision for doubtful accounts | $ 0 | $ 0 |
Time period for measurement of time charter rate, input for calculation of vessel impairments | 10 years |  |
Provision for Doubtful Accounts | $ 0 | 0 | $ 133,000
Accrued interest income | 605,000 | 1,206,000 |
Management fees to a related party (Note 4(a)) | $ 1,332,000 | $ 1,313,000 | $ 511,000
Earnings Per Share Basic | $ 0.06 | $ 0.44 | $ 1.42
Earnings Per Share Diluted | $ 0.05 | $ 0.42 | $ 1.36
Time deposits | $ 63,500,000 | $ 40,000,000 |
Maturities of time deposits | 40,000,000 | 56,500,000 |
Short-term investment placements | 63,500,000 | 50,000,000 |
Credit loss recorded | $ 0 | 0 |
Salvage Value [Member] |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Change In Accounting Estimate Description | Effective July 1, 2023, the Company reassessed the estimated scrap rate used to calculate depreciation and, based on the average demolition prices in different markets during the last 15 years, adjusted upwards the estimated scrap rate of its vessels. This change in estimate |  |
Net income |  | $ 3,773,000 |
Earnings Per Share Basic |  | $ 0.04 |
Earnings Per Share Diluted |  | $ 0.04 |
Impaired Vessels |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Impairment | $ 0 | $ 0 | $ 0
Impaired Building |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Impairment | 0 | $ 0 | $ 0
Building [Member] |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Property and equipment, estimated useful lives |  | 55 years |
Property and equipment, residual value | $ 0 |  |
Furniture [Member] |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Property and equipment, estimated useful lives |  | 5 years |
Office Equipment [Member] |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Property and equipment, estimated useful lives |  | 5 years |
Vehicles [Member] |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Property and equipment, estimated useful lives |  | 5 years |
Car [Member] |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Property and equipment, estimated useful lives |  | 10 years |
Computer Software and Hardware [Member] |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Property and equipment, estimated useful lives |  | 3 years |
Vessels [Member] |  |  |
Accounting Policies Disclosure [Line Items] |  |  |
Property and equipment, estimated useful lives | 25 years |  |

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