EARNINGS PER SHARE - Reconciliation used in Computing Basic and Diluted Net Income (Loss) per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net income attributable to Immersion stockholders	$ 28,945	$ 7,028	$ 47,600	$ 15,306
Denominator:
Weighted-average shares outstanding, basic	31,879	32,583	31,784	32,474
Shares related to outstanding options, unvested RSUs, RSAs, and PSUs	646	227	623	365
Weighted average shares outstanding, diluted	32,525	32,810	32,407	32,839