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Segment Reporting, Geographic Information, and Significant Customers - Summary of Customers Comprising 10% or Greater of Outstanding Accounts and Other Receivable (Detail) (Outstanding Accounts and Other Receivable [Member], Credit Concentration Risk [Member]) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Samsung Electronics [Member] |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Outstanding accounts and other receivable, in percentage |  | [1] |  | [1] |  | [1]
Customer B [Member] |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Outstanding accounts and other receivable, in percentage |  | [1] |  | [1] |  | [1]
Customer C [Member] |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Outstanding accounts and other receivable, in percentage | 66.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember / us-gaap_MajorCustomersAxis = immr_CustomerCMember |  |  | [1] | 33.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember / us-gaap_MajorCustomersAxis = immr_CustomerCMember |
Customer D [Member] |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Outstanding accounts and other receivable, in percentage |  | [1] |  | [1] | 38.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember / us-gaap_MajorCustomersAxis = immr_CustomerDMember |
Customer E [Member] |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Outstanding accounts and other receivable, in percentage |  | [1] | 11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember / us-gaap_MajorCustomersAxis = immr_CustomerEMember |  |  | [1]
Customer F [Member] |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Outstanding accounts and other receivable, in percentage |  | [1] |  | [1] | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember / us-gaap_MajorCustomersAxis = immr_CustomerFMember |
Customer G [Member] |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Outstanding accounts and other receivable, in percentage | 16.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember / us-gaap_MajorCustomersAxis = immr_CustomerGMember |  | 28.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember / us-gaap_MajorCustomersAxis = immr_CustomerGMember |  |  | [1]
[1] | Represents less than 10% of the Company's outstanding accounts and other receivables.

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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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