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Net Income (Loss) Per Share - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Earnings Per Share [Abstract]  
Options to purchase shares of common stock 1,400,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Average fair market value of stock $ 11.21immr_AverageFairValuePerShareOfCommonStock