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NONCONTROLLING INTEREST - Schedule of effect of changes in ownership interest in subsidiary (Detail) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended
	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
NONCONTROLLING INTEREST
Net Income (Loss) Attributable to Immersion Stockholders		$ (930)	$ 27,077
Barnes & Noble Education, Inc.
NONCONTROLLING INTEREST
Net Income (Loss) Attributable to Immersion Stockholders	$ 27,077	(930)
Increase (decrease) in additional paid-in capital as a result of common stock issuances pursuant to vesting of equity awards, and sales of common stock	55,520
Total effect of changes in ownership interest on equity attributable to Immersion stockholders	$ 82,597	$ (930)

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