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Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Aug. 03, 2022
Jun. 01, 2018
Dec. 31, 2016
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2010
Class Of Stock [Line Items]                  
Common stock, shares authorized       300,000,000 300,000,000        
Common stock, par value       $ 0.01 $ 0.01        
Preferred stock, shares authorized       10,000,000 10,000,000        
Preferred stock, par value       $ 10.00 $ 10.00        
Options, Exercised (in shares)       125,000 102,125        
Convertible Preferred Stock, Shares Issuable upon Conversion       the Company’s shares of Series N preferred stock, each of which is convertible to 40 common shares, have the right to receive dividends or dividend equivalents should the Company declare dividends on its common stock.          
Series N preferred shares, conversion price per share       $ 1,000          
Series N preferred stock, each convertible to common shares       40          
Series N preferred stockholders to liquidation preference, conversion price per share       $ 1,000 $ 1,000        
Number of Shares Authorized for Stock-Based Compensation Plan       4          
Options to purchase, Granted (in shares)       112,500 470,000        
Exercise Price, Outstanding       $ 1.77 $ 1.71 $ 1.38      
Exercise price, options granted in period       $ 2.01 $ 2.91        
Number of Shares Authorized for Stock-Based Compensation Plan       4          
Stock-based compensation expense       $ 1,253 $ 776        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares       694,875 990,125        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value       $ 1.81 $ 1.9        
Unrecognized stock-based compensation       $ 107          
Fair Value of Options Vested in Period       $ 600 $ 600        
Number Exercisable       1,536,725 1,275,225        
Aggregate intrinsic value of exercisable options       $ 926 $ 2,042        
Aggregate intrinsic value of options exercised       100 200        
On June One Two Thousand Eighteen [Member]                  
Class Of Stock [Line Items]                  
Stock-based compensation expense         21,500        
Unrecognized stock-based compensation expense       $ 0 0        
Restricted Stock [Member]                  
Class Of Stock [Line Items]                  
Unrecognized stock-based compensation, Period for recognition       2 months 12 days          
Tax benefit recognized       $ 400 2,200        
Restricted Stock [Member] | On August Three Two Thousand Twenty Two [Member]                  
Class Of Stock [Line Items]                  
Options to purchase, Granted (in shares) 40,000                
Stock-based compensation expense         $ 44,400        
Weighted average grant date fair value         $ 1.58        
Unrecognized stock-based compensation expense       $ 0 $ 0        
Weighted average vesting shares 75,000                
Other Options Issued [Member]                  
Class Of Stock [Line Items]                  
Options to purchase, Granted (in shares)             150,000 90,000  
Exercise price, options granted in period             $ 1.78 $ 1.41  
2016 Stock Option Plan [Member]                  
Class Of Stock [Line Items]                  
Number of Shares Authorized for Stock-Based Compensation Plan     3,150,000            
Stock Option Award Vesting Period     4 years            
Number of Shares Authorized for Stock-Based Compensation Plan     3,150,000            
2016 Stock Option Plan [Member] | Minimum [Member]                  
Class Of Stock [Line Items]                  
Exercise Price, Outstanding     $ 0.45            
2016 Stock Option Plan [Member] | Maximum [Member]                  
Class Of Stock [Line Items]                  
Exercise Price, Outstanding     $ 3.33            
2022 Stock Option Plan [Member]                  
Class Of Stock [Line Items]                  
Options, Exercised (in shares)       3,750 5,375        
Number of Shares Authorized for Stock-Based Compensation Plan           3,500,000      
Options to purchase, Granted (in shares)       112,500 470,000        
Stock Option Award Vesting Period           4 years      
Number of Shares Authorized for Stock-Based Compensation Plan           3,500,000      
Stock Option Issued under 2022 Heritage Global Inc. Equity Incentive Plan       112,500 470,000        
2022 Stock Option Plan [Member] | Minimum [Member]                  
Class Of Stock [Line Items]                  
Exercise Price, Outstanding           $ 1.60      
2022 Stock Option Plan [Member] | Maximum [Member]                  
Class Of Stock [Line Items]                  
Exercise Price, Outstanding           3.55      
2010 Non-Qualified Stock Option Plan [Member]                  
Class Of Stock [Line Items]                  
Options, Exercised (in shares)       21,250 5,000        
Number of Shares Authorized for Stock-Based Compensation Plan                 1,250,000
Stock Option Award Vesting Period       4 years          
Number of Shares Authorized for Stock-Based Compensation Plan                 1,250,000
2010 Non-Qualified Stock Option Plan [Member] | Minimum [Member]                  
Class Of Stock [Line Items]                  
Exercise Price, Outstanding       $ 0.4          
2010 Non-Qualified Stock Option Plan [Member] | Maximum [Member]                  
Class Of Stock [Line Items]                  
Exercise Price, Outstanding       $ 2.77          
Employee Stock Option                  
Class Of Stock [Line Items]                  
Options, Exercised (in shares)       111,250 102,125        
Unrecognized stock-based compensation       $ 900          
Unrecognized stock-based compensation, Period for recognition       1 year 7 months 6 days          
Aggregate intrinsic value of exercisable options       $ 900 $ 2,000        
Employee Stock Option | Annual Compensation Plan [Member]                  
Class Of Stock [Line Items]                  
Tax benefit recognized       100 400        
Employee Stock Option | Annual Compensation Plan [Member] | Selling, General and Administrative Expenses [Member]                  
Class Of Stock [Line Items]                  
Stock-based compensation expense       $ 700 $ 500        
Directors [Member] | 2022 Stock Option Plan [Member] | Restricted Stock [Member] | On August Three Two Thousand Twenty Two [Member]                  
Class Of Stock [Line Items]                  
Options to purchase, Granted (in shares) 115,000                
Common Stock [Member]                  
Class Of Stock [Line Items]                  
Options, Exercised (in shares)       45,752 75,767        
Series N preferred stockholders to liquidation preference, conversion price per share           $ 1,000      
Preferred Stock [Member]                  
Class Of Stock [Line Items]                  
Convertible Preferred Stock, Shares Issuable upon Conversion       Each share of Series N preferred stock has a voting entitlement equal to 40 common shares, votes with the common stock on an as-converted basis and is senior to all other preferred stock of the Company. Dividends, if any, will be paid on an as-converted basis equal to common stock dividends. The conversion value of each share of Series N preferred stock is $1,000, and each share is convertible to 40 common shares at the rate of $25.00 per common share. The holders of shares of Series N preferred stock are entitled to liquidation preference over common stockholders equivalent to $1,000 per share.          
Share price       $ 25          
Conversion of series N preferred stock to shares of common stock       0 2        
David Ludwig And Tom Ludwig [Member] | On June One Two Thousand Eighteen [Member]                  
Class Of Stock [Line Items]                  
Issuance of restricted common stock (in shares)   600,000              
Weighted average grant date fair value         $ 0.43        
Series N Preferred Stock [Member]                  
Class Of Stock [Line Items]                  
Series N preferred stock, each convertible to common shares         80