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Segment Reporting, Geographic Information, and Significant Customers - Schedule of Revenue by Market Areas (Detail) (Net Revenues [Member], Market [Member]) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Concentration Risk [Line Items] |  |  |
Revenues by product and market area, in percentage | 100.00%us-gaap_ConcentrationRiskPercentage1 | 100.00%us-gaap_ConcentrationRiskPercentage1 | 100.00%us-gaap_ConcentrationRiskPercentage1
Mobile, Wearables, and Consumer [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Revenues by product and market area, in percentage | 60.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_MobileWearablesMember | 66.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_MobileWearablesMember | 46.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_MobileWearablesMember
Gaming Devices [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Revenues by product and market area, in percentage | 27.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_GamingMember | 21.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_GamingMember | 28.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_GamingMember
Automotive [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Revenues by product and market area, in percentage | 5.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_AutomotiveMember | 5.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_AutomotiveMember | 6.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_AutomotiveMember
Medical [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Revenues by product and market area, in percentage | 8.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_MedicalMember | 8.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_MedicalMember | 16.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_MedicalMember
Other [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Revenues by product and market area, in percentage | 0.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_OtherMarketMember | 0.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_OtherMarketMember | 4.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = immr_MarketConcentrationRiskMember / us-gaap_ProductOrServiceAxis = immr_OtherMarketMember

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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