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Transactions With Related Parties, Central Shipping Inc (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Central Shipping Inc ("CSI") - Letter Agreement and Management Agreements [Abstract]      
Due to related parties $ 237,000 $ 29,755,000  
Central Shipping Inc [Member]      
Central Shipping Inc ("CSI") - Letter Agreement and Management Agreements [Abstract]      
Notice period to terminate agreement 18 months    
Number of months of fees payable used to determine termination fee 12 months    
Daily management fee per vessel $ 600    
Commencement period of daily management prior to scheduled delivery of vessel 3 months    
Daily fee for superintendent visits $ 546    
Chartering commission percentage 1.25%    
Commission percentage on all gross vessel sale proceeds or the purchase price paid for vessels 1.00%    
Financing fee percentage 0.20%    
Supervision services fee percentage 7.00%    
Initial term of agreement 5 years    
Consumer Price Inflation 0.02    
Increase in fees payable if CPI is less than 2% 2.00%    
Percentage of newbuilding vessels monitoring fee paid on purchase of newbuilding construction contract 25.00%    
Percentage of newbuilding vessels monitoring fee paid on steel cutting of newbuilding vessel 25.00%    
Percentage of newbuilding vessels monitoring fee paid on launching of newbuilding vessel 25.00%    
Percentage of newbuilding vessels monitoring fee paid on delivery of newbuilding vessel 25.00%    
Due to related parties $ 237,000 1,193,000  
Transactions with Related Parties [Abstract]      
Fees and expenses 4,855,000 5,664,000 $ 12,253,000
Central Shipping Inc [Member] | Vessels, Net / Advances for Vessels Under Construction [Member]      
Transactions with Related Parties [Abstract]      
Management fees 61,000 199,000 69,000
Supervision services fees 14,000 79,000 63,000
Superintendent fees 129,000 255,000 198,000
Newbuilding vessels monitoring fee 455,000 1,365,000 0
Newbuilding supervision related pass-through costs 236,000 1,207,000 967,000
Central Shipping Inc [Member] | Investments in Unconsolidated Joint Ventures [Member]      
Transactions with Related Parties [Abstract]      
Commission for sale and purchase of vessels   0 454,000
Central Shipping Inc [Member] | Capitalized Right-of-use Assets from Operating Leases [Member]      
Transactions with Related Parties [Abstract]      
Commission for sale and purchase of vessels   0 1,017,000
Central Shipping Inc [Member] | Current and Non-Current Portions of Long-term Debt [Member]      
Transactions with Related Parties [Abstract]      
Financing fees 312,000 150,000 0
Central Shipping Inc [Member] | Management Fees - Related Parties [Member]      
Transactions with Related Parties [Abstract]      
Management fees 1,749,000 1,477,000 1,953,000
Accounting and reporting cost 360,000 360,000 330,000
Commission for sale and purchase of vessels   793,000 3,377,000
Central Shipping Inc [Member] | Vessel Operating Expenses [Member]      
Transactions with Related Parties [Abstract]      
Superintendent fees 37,000 17,000 60,000
Central Shipping Inc [Member] | Loss from Vessel Sales [Member]      
Transactions with Related Parties [Abstract]      
Commission for sale and purchase of vessels 730,000 0 3,971,000
Central Shipping Inc [Member] | Impairment on Vessels [Member]      
Transactions with Related Parties [Abstract]      
Commission for sale and purchase of vessels   264,000 0
Central Shipping Inc [Member] | Voyage Expenses [Member]      
Transactions with Related Parties [Abstract]      
Commission on charter hire agreements $ 1,008,000 $ 705,000 $ 761,000