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, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator
Net income (loss)	$ (5,945)	$ 1,777	$ (61,064)	$ 76,245
Less: Net income attributable to noncontrolling interests	266		33
Net income (loss) attributable to Corsair Gaming, Inc.	(6,211)	1,777	(61,097)	76,245
Change in redemption value of redeemable noncontrolling interests	(2,690)		(12,330)
Net income (loss) attributable to common stockholders of Corsair Gaming, Inc.	$ (8,901)	$ 1,777	$ (73,427)	$ 76,245
Weighted-average common shares outstanding:
Basic	95,858	93,918	95,537	92,894
Effect of dilutive securities		6,123		7,222
Total diluted weighted-average shares outstanding	95,858	100,041	95,537	100,116
Net income (loss) per share attributable to common stockholders of Corsair Gaming, Inc.:
Basic	$ 0.09	$ 0.02	$ (0.77)	$ 0.82
Diluted	$ 0.09	$ 0.02	$ (0.77)	$ 0.76
Anti-dilutive potential common shares	11,241	1,226	10,941	792