Investments in Affiliate Companies and Available-for-Sale Securities (Details Narrative)
$ in Thousands
3 Months Ended 6 Months Ended 8 Months Ended 9 Months Ended 12 Months Ended
Jan. 04, 2021
shares
Jun. 30, 2022
USD ($)
shares
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
shares
Jun. 30, 2021
USD ($)
Aug. 25, 2021
shares
Oct. 15, 2021
shares
Dec. 31, 2021
USD ($)
shares
Investments in affiliate companies   $ 148,384   $ 148,384       $ 125,744
Equity in net earnings of affiliated companies   13,160 $ 12,854 22,958 $ 40,594      
Investment in available-for-sale-securities   $ 220   $ 220       $ 219
Navios Acquisition [Member] | Navios Acquisition's Ship Mortgage Notes [Member]                
Sale of Stock, Number of Shares Issued in Transaction | shares           44,117,647    
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate           8.125%    
Debt Instrument, Maturity Date           Sep. 25, 2021    
Navios Partners [Member]                
Equity Method Investment, Ownership Percentage   10.30%   10.30%       10.30%
Difference between carrying amount of investment and underlying equity in net assets of equity method investee   $ 54,479   $ 54,479       $ 56,351
Investments in affiliate companies   148,384   148,384       125,744
Equity in net earnings of affiliated companies   13,160 9,125 22,958 38,322      
Dividends received   159 128 318 232      
Market value of the investment   $ 73,214   $ 73,214        
Navios Partners [Member] | Upon NMCI and NNA Merger [Member]                
Partners' Capital Account, Units | shares   3,183,199   3,183,199        
Equity Method Investment, Ownership Percentage   10.30%   10.30%        
Navios Acquisition [Member]                
Equity in net earnings of affiliated companies   $ 0 3,739 $ 0 1,686      
Dividends received       0 243      
Shares conversion rate             0.1275  
Partners' Capital Account, Units, Acquisitions | shares             3,388,226  
Navios Containers [Member]                
Equity in net earnings of affiliated companies       0 596      
AFS Securities [Member]                
Investment in available-for-sale-securities   220   220       $ 219
Available-for-sale Equity Securities, Gross Unrealized Gain   $ 57 $ 101 $ 2 $ 142      
Navios Containers [Member] | Navios Partners [Member] | NMCI Merger [Member]                
Shares conversion rate 0.39              
Common units issued | shares 8,133,452              
Navios Holdings [Member] | Navios Partners [Member]                
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest       2.00%        
Navios Partners [Member] | Continuous Offering Program Sales Agreement [Member] | General Partner [Member]                
Partners' Capital Account, Units, Sale of Units | shares       156,895       156,895
Navios Partners [Member] | Common Stock [Member] | Continuous Offering Program Sales Agreement [Member]                
Partners' Capital Account, Units, Sale of Units | shares       7,687,730       7,687,730