Net Income (Loss) Per Share (Details Textual) (USD $)	6 Months Ended
Jun. 30, 2011
Net Income (Loss) Per Share (Textual) [Abstract]
Options to purchase shares of common stock	907,000
Exercise prices greater than the average fair market value of stock	$ 7.21

Options to purchase shares of common stock with exercise prices greater than the fair market value of the Company's stock that were not included in the earnings per share calculation because the effect would have been anti-dilutive.

No definition available.

Name:	immr_ExercisePricesGreaterThanAverageFairMarketValueOfStock
Namespace Prefix:	immr_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration