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Basis of Preparation and Significant Accounting Policies (Details Narrative)
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Disclosure of initial application of standards or interpretations [line items]        
Comprehensive income $ 24,280,000 $ 14,950,000 $ (17,372,000)  
Cash flows from (used in) operating activities 26,906,000 20,750,000 (6,243,000)  
Cash and cash equivalents 52,833,000 45,213,000 19,037,000 $ 2,366,000
Working capital surplus 45,000,000      
Impairment loss $ 0 0 4,615,000  
Entity Accounting Standard International Financial Reporting Standards      
Provision for doubtful trade receivables $ 0 8,000    
Current portion of non-current borrowings 6,803,000 5,044,000    
Borrowing costs capitalised     0  
Proceeds from borrowings, classified as financing activities $ 18,000,000 34,250,000 0  
Number Of Operating Segments 1      
Description of nature of benefits provided by plan If the employee remains in the employment of the Company until normal retirement age, they are entitled to retirement compensation which is equal to 40% of the compensation amount that would be payable if they were dismissed at that time.      
Net defined benefit liability $ 148,000 114,000    
Direct operating expense from investment property 18,451,000      
Lease components 42,939,000      
First Citizens Bank & Trust Company (formerly known as CIT Bank N.A.) [member]        
Disclosure of initial application of standards or interpretations [line items]        
Borrowing costs capitalised 259,000 545,000    
Proceeds from borrowings, classified as financing activities $ 18,000,000      
Current Accrued Interest [Member]        
Disclosure of initial application of standards or interpretations [line items]        
Current portion of non-current borrowings   179,000    
Deferred Dry-docking costs [member]        
Disclosure of initial application of standards or interpretations [line items]        
Interval Between Vessel Drydocking Special Survey 2 years 6 months      
Depreciation method straight-line basis      
Vessels [member]        
Disclosure of initial application of standards or interpretations [line items]        
Depreciation method straight-line basis      
Useful life 25 years      
Vessels scrap rate per ton $ 440 380 $ 300  
Decrease in depreciation expense due to changes in scrap rate $ 118,000 $ 145,000