Stockholders' Equity (Narrative) (Details) - USD ($)						12 Months Ended
	Aug. 03, 2022	Apr. 08, 2021	Jun. 01, 2018	Dec. 31, 2016	Dec. 31, 2010	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
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)						339,125	1,895,437
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	120
Series N preferred stockholders to liquidation preference, conversion price per share						$ 1,000	$ 1,000
Conversion of series N preferred stock to shares of common stock						0
Number of Shares Authorized for Stock-Based Compensation Plan						4
Term of Stock-Based Compensation Plan						6 years	6 years 7 months 6 days
Options to purchase, Granted (in shares)		25,000				279,500	722,500
Exercise Price, Outstanding						$ 1.38	$ 1.23	$ 0.63
Exercise price, options granted in period						$ 1.62	$ 2.28
Number of Shares Authorized for Stock-Based Compensation Plan						4
Stock-based compensation expense						$ 540,000	$ 408,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares						1,003,375	1,214,938
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value						$ 1.80	$ 0.96
Unrecognized stock-based compensation						$ 1,000,000
Unrecognized stock-based compensation, Period for recognition						2 years 7 months 6 days
Fair Value of Options Vested in Period						$ 400,000	$ 200,000
Aggregate intrinsic value of exercisable options						$ 1,500,000	$ 1,300,000
Other Options Issued [Member]
Class Of Stock [Line Items]
Options, Exercised (in shares)						21,250	22,500
Options to purchase, Granted (in shares)							150,000	90,000
Exercise price, options granted in period							$ 1.78	$ 1.41
Restricted Stock [Member]
Class Of Stock [Line Items]
Options to purchase, Granted (in shares)	40,000
Stock-based compensation expense						$ 124,600
Shares restriction term of service		2 years
Weighted average grant date fair value						$ 1.58
Unrecognized stock-based compensation expense						$ 44,000
Weighted average vesting shares	75,000
Annual Compensation Plan [Member] | Stock Options [Member]
Class Of Stock [Line Items]
Tax benefit recognized						500,000	$ 1,000,000
Annual Compensation Plan [Member] | Stock Options [Member] | Selling, General and Administrative Expenses [Member]
Class Of Stock [Line Items]
Stock-based compensation expense						$ 400,000	$ 400,000
2010 Non-Qualified Stock Option Plan [Member]
Class Of Stock [Line Items]
Options, Exercised (in shares)						147,500	793,750
Number of Shares Authorized for Stock-Based Compensation Plan					1,250,000
Options to purchase, Granted (in shares)						100,000	50,000
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					$ 0.40
2010 Non-Qualified Stock Option Plan [Member] | Maximum [Member]
Class Of Stock [Line Items]
Exercise Price, Outstanding					$ 2.77
2010 Non-Qualified Stock Option Plan [Member] | Directors [Member]
Class Of Stock [Line Items]
Options to purchase, Granted (in shares)						100,000	50,000
2016 Stock Option Plan [Member]
Class Of Stock [Line Items]
Options, Exercised (in shares)						170,375	1,079,187
Number of Shares Authorized for Stock-Based Compensation Plan				3,150,000
Options to purchase, Granted (in shares)						35,000	522,500
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]
Number of Shares Authorized for Stock-Based Compensation Plan						3,500,000
Options to purchase, Granted (in shares)						144,500
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						144,500
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						$ 1.87
2022 Stock Option Plan [Member] | Directors [Member] | Restricted Stock [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)						242,475	1,268,399
Issuance of restricted common stock (in shares)		25,000
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						$ 25.00
David Ludwig And Tom Ludwig [Member]
Class Of Stock [Line Items]
Issuance of restricted common stock (in shares)			600,000
Stock-based compensation expense						$ 51,600
Unrecognized stock-based compensation						$ 21,500
Weighted average grant date fair value						$ 0.43