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Significant Accounting policies (Details Narrative) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Provision for doubtful debt $ 629,000 $ 373,000 $ 1,607,000
Depreciation method straight-line    
Useful life 25 years    
Salvage value per light weight ton $ 300 300  
Revenue recognition method straight line    
Operating Lease, Right-of-Use Asset $ 48,256,000 886,000  
Operating Lease, Liability, Noncurrent $ 48,256,000 886,000  
Office Building [Member]      
Operating Lease, Weighted Average Discount Rate, Percent 4.00%    
Operating Lease, Right-of-Use Asset $ 552,000 886,000  
Operating Lease, Liability, Noncurrent $ 552,000 886,000  
Operating lease expense recognition method straight line    
Operating Lease, Weighted Average Remaining Lease Term 2 years 3 days    
Operating lease expense $ 501,000 461,000 $ 352,000
Charter In Vessels [Member]      
Operating Lease, Weighted Average Discount Rate, Percent 3.00%    
Operating Lease, Right-of-Use Asset $ 47,704,000 0  
Operating Lease, Liability, Noncurrent $ 47,704,000 $ 0  
Lessee, Operating Lease, Description initial term of 12 months or less    
Operating lease expense recognition method straight line    
Operating Lease, Weighted Average Remaining Lease Term 5 years 10 months 6 days