Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (18,957)	$ (16,198)	$ (65,318)	$ (85,741)
Foreign currency translation adjustment	(333)	(159)	(158)	(159)
Comprehensive loss	(19,290)	(16,357)	(65,476)	(85,900)
Less: Comprehensive loss attributable to noncontrolling interest	(745)	(64)	(959)	(64)
Comprehensive loss attributable to Forge Global Holdings, Inc.	$ (18,545)	$ (16,293)	$ (64,517)	$ (85,836)