Net Income (Loss) Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator
Net loss	$ (2,886)	$ (5,945)	$ (8,613)	$ (61,064)
Less: Net income attributable to noncontrolling interest	193	266	958	33
Net loss attributable to Corsair Gaming, Inc.	(3,079)	(6,211)	(9,571)	(61,097)
Change in redemption value of redeemable noncontrolling interest		(2,690)	6,535	(12,330)
Net loss attributable to common stockholders of Corsair Gaming, Inc.	$ (3,079)	$ (8,901)	$ (3,036)	$ (73,427)
Denominator
Basic weighted-average shares outstanding	102,863	95,858	102,288	95,537
Total diluted weighted-average shares outstanding	102,863	95,858	102,288	95,537
Net loss per share attributable to common stockholders of Corsair Gaming, Inc.:
Basic	$ (0.03)	$ (0.09)	$ (0.03)	$ (0.77)
Diluted	$ (0.03)	$ (0.09)	$ (0.03)	$ (0.77)
Anti-dilutive potential common shares	12,290	11,241	12,290	10,941