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	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 (loss)	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 (in shares)			456,469				119,174
Release of restricted stock units and awards, net of shares withheld	(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 (loss)	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 (in shares)			54,514				21,238
Release of restricted stock units and awards, net of shares withheld	(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 Dec. 31, 2023	183,102	183,102	$ 48	322,134	1,702	(36,040)	$ (104,742)	0
Beginning balance (in shares) at Dec. 31, 2023			47,636,273				16,107,296
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	39,591	47,600				47,600		(8,009)
Unrealized gain on available-for-sale securities, net of taxes	(367)	(367)			(367)
Barnes & Noble Education acquisition	203,657							203,657
Release of restricted stock units and awards, net of shares withheld (in shares)			347,046				85,196
Release of restricted stock units and awards, net of shares withheld	(621)	(621)					$ (621)
Shares issued to an employee in lieu of cash compensation (in shares)			169,920
Shares issued to an employee in lieu of cash compensation	1,316	1,316		1,316
Dividends declared	(3,026)	(3,026)		(3,026)
Stock-based compensation	2,268	2,268		2,268
Ending balance at Jun. 30, 2024	425,920	230,272	$ 48	322,692	1,335	11,560	$ (105,363)	195,648
Ending balance (in shares) at Jun. 30, 2024			48,153,239				16,192,492
Beginning balance at Mar. 31, 2024	201,456	201,456	$ 48	322,262	1,530	(17,385)	$ (104,999)	0
Beginning balance (in shares) at Mar. 31, 2024			47,926,496				16,144,097
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	20,936	28,945				28,945		(8,009)
Unrealized gain on available-for-sale securities, net of taxes	(195)	(195)			(195)
Barnes & Noble Education acquisition	203,657							203,657
Release of restricted stock units and awards, net of shares withheld (in shares)			137,500				48,395
Release of restricted stock units and awards, net of shares withheld	(364)	(364)					$ (364)
Shares issued to an employee in lieu of cash compensation (in shares)			89,243
Shares issued to an employee in lieu of cash compensation	762	762		762
Dividends declared	(1,524)	(1,524)		(1,524)
Stock-based compensation	1,192	1,192		1,192
Ending balance at Jun. 30, 2024	$ 425,920	$ 230,272	$ 48	$ 322,692	$ 1,335	$ 11,560	$ (105,363)	$ 195,648
Ending balance (in shares) at Jun. 30, 2024			48,153,239				16,192,492