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Summary of Significant Accounting Policies Concentrations (Details) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Licensee 1 [Member] | Revenue, Rights Granted [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 22.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee1Member | 38.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee1Member | 21.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee1Member
Licensee 1 [Member] | Accounts Receivable [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 30.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee1Member | 60.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee1Member |
Licensee 2 [Member] | Revenue, Rights Granted [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 22.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee2Member | 16.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee2Member | 14.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee2Member
Licensee 2 [Member] | Accounts Receivable [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 17.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee2Member | 22.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee2Member |
Licensee 3 [Member] | Revenue, Rights Granted [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage |  |  | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee3Member
Licensee 3 [Member] | Accounts Receivable [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 15.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee3Member |  |
Licensee 4 [Member] | Revenue, Rights Granted [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage |  |  | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_Licensee4Member
Licensees in foreign jurisdictions [Member] | Revenue, Rights Granted [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 43.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_LicenseesInForeignJurisdictionsMember | 24.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_LicenseesInForeignJurisdictionsMember | 43.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_RevenueRightsGrantedMember / us-gaap_ConcentrationRiskByTypeAxis = actg_LicenseesInForeignJurisdictionsMember

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