CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Total Stockholders' Equity Attributable to Immersion Stockholder	Common Stock	Additional Paid In Capital	Accumulated Other Comprehensive Income (loss)	Accumulated Earnings (Deficit)	Treasury Stock	Noncontrolling Interest
Beginning balance at Dec. 31, 2022	$ 157,700	$ 157,700	$ 47	$ 322,667	$ 202	$ (70,016)	$ (95,200)	$ 0
Beginning balance (in shares) at Dec. 31, 2022			46,974,598				14,727,582
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,306	15,306				15,306
Unrealized gain on available-for-sale securities, net of taxes	673	673			673
Stock repurchases (in shares)							(413,696)
Stock repurchases	(2,852)	(2,852)					$ (2,852)
Release of restricted stock units and awards, net of shares withheld for payroll taxes (in shares)			456,469				119,174
Release of restricted stock units and awards, net of shares withheld for payroll taxes	(946)	(946)	$ 1				$ (947)
Proceeds from stock option exercises (in shares)			21,222
Proceeds from stock option exercises	160	160		160
Issuance of stock for ESPP purchase (in shares)			1,298
Issuance of stock for ESPP purchase	6	6		6
Shares issued to an employee in lieu of cash compensation (in shares)			65,477
Shares issued to an employee in lieu of cash compensation	489	489		489
Dividends declared	(2,207)	(2,207)		(2,207)
Stock-based compensation	1,707	1,707		1,707
Ending balance at Jun. 30, 2023	170,036	170,036	$ 48	322,822	875	(54,710)	$ (98,999)	0
Ending balance (in shares) at Jun. 30, 2023			47,519,064				15,260,452
Beginning balance at Mar. 31, 2023	165,729	165,729	$ 48	322,799	577	(61,738)	$ (95,957)	0
Beginning balance (in shares) at Mar. 31, 2023			47,428,494				14,825,518
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,028	7,028				7,028
Unrealized gain on available-for-sale securities, net of taxes	298	298			298
Stock repurchases (in shares)							(413,696)
Stock repurchases	(2,852)	(2,852)					$ (2,852)
Release of restricted stock units and awards, net of shares withheld for payroll taxes (in shares)			54,514				21,238
Release of restricted stock units and awards, net of shares withheld for payroll taxes	(190)	(190)					$ (190)
Proceeds from stock option exercises (in shares)			21,222
Proceeds from stock option exercises	160	160		160
Shares issued to an employee in lieu of cash compensation (in shares)			14,834
Shares issued to an employee in lieu of cash compensation	106	106		106
Dividends declared	(1,003)	(1,003)		(1,003)
Stock-based compensation	760	760		760
Ending balance at Jun. 30, 2023	170,036	170,036	$ 48	322,822	875	(54,710)	$ (98,999)	0
Ending balance (in shares) at Jun. 30, 2023			47,519,064				15,260,452
Beginning balance at Apr. 30, 2024	201,230	201,230	$ 48	322,786	2,019	(18,263)	$ (105,360)	0
Beginning balance (in shares) at Apr. 30, 2024			48,047,329				16,192,492
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	68,154	54,317				54,317		13,837
Unrealized gain on available-for-sale securities, net of taxes	(488)	(488)			(488)
Barnes & Noble Education acquisition	203,657							203,657
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	9,412	(830)		(830)				10,242
Release of restricted stock units and awards, net of shares withheld for payroll taxes (in shares)			542,333				217,380
Release of restricted stock units and awards, net of shares withheld for payroll taxes	(2,047)	(2,047)	$ 1				$ (2,048)
Shares issued to an employee in lieu of cash compensation (in shares)			95,915
Shares issued to an employee in lieu of cash compensation	817	817		817
Dividends declared	(3,043)	(3,043)		(1,524)		(1,519)
Rebalancing of controlling and non-controlling interest	0	57,240		57,240				(57,240)
Stock-based compensation	4,795	3,685		3,685				1,110
Ending balance at Oct. 31, 2024	482,487	310,881	$ 49	382,174	1,531	34,535	$ (107,408)	171,606
Ending balance (in shares) at Oct. 31, 2024			48,685,577				16,409,872
Beginning balance at Jul. 31, 2024	416,781	284,264	$ 48	380,007	1,801	8,897	$ (106,489)	132,517
Beginning balance (in shares) at Jul. 31, 2024			48,436,572				16,311,799
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	55,759	27,157				27,157		28,602
Unrealized gain on available-for-sale securities, net of taxes	(270)	(270)			(270)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	9,412	(830)		(830)				10,242
Release of restricted stock units and awards, net of shares withheld for payroll taxes (in shares)			242,333				98,073
Release of restricted stock units and awards, net of shares withheld for payroll taxes	(918)	(918)	$ 1				$ (919)
Shares issued to an employee in lieu of cash compensation (in shares)			6,672
Shares issued to an employee in lieu of cash compensation	55	55		55
Dividends declared	(1,519)	(1,519)				(1,519)
Rebalancing of controlling and non-controlling interest	0	788		788				(788)
Stock-based compensation	3,187	2,154		2,154				1,033
Ending balance at Oct. 31, 2024	$ 482,487	$ 310,881	$ 49	$ 382,174	$ 1,531	$ 34,535	$ (107,408)	$ 171,606
Ending balance (in shares) at Oct. 31, 2024			48,685,577				16,409,872