Preferred and Common Stock (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 2 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended 8 Months Ended 12 Months Ended
Jul. 10, 2020
Feb. 21, 2020
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Mar. 21, 2019
Apr. 18, 2019
Jun. 30, 2021
Jun. 30, 2020
Jul. 15, 2017
Sep. 09, 2021
Dec. 21, 2020
Dec. 31, 2020
Common Stock, Shares, Outstanding     15,897,064           15,897,064         15,881,147
Preferred Stock, Shares Outstanding     23,032           23,032         23,032
Payments of Ordinary Dividends, Noncontrolling Interest                 $ (0) $ 9,948        
Grimaud [Member]                            
Number of shares                       6,434,000    
Proceeds from Sale of Available-for-sale Securities, Equity                       $ 31,270    
Navios Corporation [Member]                            
Common Stock, Shares, Outstanding     2,414,263           2,414,263         2,414,263
Navios Logistics [Member]                            
Payments of Dividends $ 6,381 $ 27,500                        
Payments of Ordinary Dividends, Noncontrolling Interest $ 2,308 9,948                        
Navios Logistics [Member] | Navios Holdings [Member]                            
Payments of Dividends   $ 17,552                        
Common Stock Dividends, Shares 2,414,263                          
Series G And Series H [Member]                            
Percentage of the increase of the preferred dividend rate                     0.25%      
Series G Preferred Stock [Member]                            
Number of shares                 2,000,000          
Preferred Stock, Liquidation Preference Per Share     $ 2,500           $ 2,500          
Preferred Stock, Redemption Price Per Share     $ 25.00           $ 25.00          
Dividend rate of preferred stock                 8.75%          
Preferred Stock, Shares Outstanding     5,350           5,350         5,350
Series G Preferred Stock [Member] | Senior Notes 2024 [Member]                            
Dividend cancelled               $ 6,798            
Number of shares issued for the exchange offer               8,841            
Shares tendered, nominal value               $ 21,271            
Tender offer expenses               620            
Payments for repurchase of preferred stock               4,423            
2024 Notes issues               3,879            
Gain/ (Loss) from stock redemption recognized in Retained Earnings               $ 12,568            
Series H Preferred Stock [Member]                            
Number of shares                 4,800,000          
Preferred Stock, Liquidation Preference Per Share     $ 2,500           $ 2,500          
Preferred Stock, Redemption Price Per Share     $ 25.00           $ 25.00          
Dividend rate of preferred stock                 8.625%          
Preferred Stock, Shares Outstanding     17,682           17,682         17,682
Series H Preferred Stock [Member] | Senior Notes 2024 [Member]                            
Dividend cancelled             $ 7,678              
Number of shares issued for the exchange offer             10,930              
Shares tendered, nominal value             $ 26,297              
Tender offer expenses             997              
Payments for repurchase of preferred stock             4,188              
2024 Notes issues             4,747              
Gain/ (Loss) from stock redemption recognized in Retained Earnings             $ 16,365              
Stock plan approved by Board of Directors [Member]                            
Stock-based compensation expenses, shares granted                         16,000  
Preferred Stock [Member]                            
Conversion of Stock, Shares Converted           210                
Dividend cancelled       $ 171                    
Preferred Stock [Member] | Dividend Undeclared [Member]                            
Undeclared Preferred Dividends                 $ 27,783          
Common Stock [Member]                            
Conversion of Stock, Shares Issued           (22,712)                
Common Stock [Member] | Dividend Undeclared [Member]                            
Share Price       $ 6                    
Common Stock [Member] | Dividends Undeclared [Member]                            
Conversion of Stock, Shares Issued           (1,712)                
Restricted Stock [Member]                            
Forfeited shares of common stock     56   1,230       83 1,230        
Vested units     0   84,336       37,879 84,336