Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (18,844)	$ (18,957)	$ (51,878)	$ (65,318)
Foreign-currency translation adjustment	388	(333)	57	(158)
Comprehensive loss	(18,456)	(19,290)	(51,821)	(65,476)
Less: Comprehensive loss attributable to noncontrolling interest	(326)	(745)	(1,153)	(959)
Comprehensive loss attributable to Forge Global Holdings, Inc.	$ (18,130)	$ (18,545)	$ (50,668)	$ (64,517)