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Commitments and Contingencies (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Rent expense |  |  |  |  |  |  |  |  | $ 1,523,000 us-gaap_LeaseAndRentalExpense | $ 1,312,000 us-gaap_LeaseAndRentalExpense |  | $ 898,000 us-gaap_LeaseAndRentalExpense
Other | 0 us-gaap_OtherCostAndExpenseOperating | 1,548,000 us-gaap_OtherCostAndExpenseOperating | 0 us-gaap_OtherCostAndExpenseOperating | 0 us-gaap_OtherCostAndExpenseOperating | 0 us-gaap_OtherCostAndExpenseOperating | 3,506,000 us-gaap_OtherCostAndExpenseOperating | 0 us-gaap_OtherCostAndExpenseOperating | 0 us-gaap_OtherCostAndExpenseOperating | 1,548,000 us-gaap_OtherCostAndExpenseOperating | 3,506,000 us-gaap_OtherCostAndExpenseOperating | 0 us-gaap_OtherCostAndExpenseOperating |
Loss Contingencies, Amount Requested from Defendants |  |  |  |  |  |  |  |  | 2,800,000 actg_LossContingenciesAmountRequestedfromDefendants |  |  |
Partners' capital, authorized | 250,000,000 actg_PartnersCapitalAuthorized |  |  |  |  |  |  |  | 250,000,000 actg_PartnersCapitalAuthorized |  |  |
Cash and other assets, IP Fund | 2,823,000 actg_CashAndOtherAssetsIpFund |  |  |  | 2,927,000 actg_CashAndOtherAssetsIpFund |  |  |  | 2,823,000 actg_CashAndOtherAssetsIpFund | 2,927,000 actg_CashAndOtherAssetsIpFund |  |
Patents, net of accumulated amortization, IP Fund | 967,000 actg_PatentsNetOfAccumulatedAmortizationIpFund |  |  |  | 1,373,000 actg_PatentsNetOfAccumulatedAmortizationIpFund |  |  |  | 967,000 actg_PatentsNetOfAccumulatedAmortizationIpFund | 1,373,000 actg_PatentsNetOfAccumulatedAmortizationIpFund |  |
Investments, IP Fund | 8,281,000 actg_InvestmentsIpFund |  |  |  | 11,120,000 actg_InvestmentsIpFund |  |  |  | 8,281,000 actg_InvestmentsIpFund | 11,120,000 actg_InvestmentsIpFund |  |
Total assets, IP Fund | 12,071,000 actg_TotalAssetsIpFund |  |  |  | 15,420,000 actg_TotalAssetsIpFund |  |  |  | 12,071,000 actg_TotalAssetsIpFund | 15,420,000 actg_TotalAssetsIpFund |  |
Accrued expenses and contributions, IP Fund | 1,876,000 actg_AccruedExpensesAndContributionsIpFund |  |  |  | 2,437,000 actg_AccruedExpensesAndContributionsIpFund |  |  |  | 1,876,000 actg_AccruedExpensesAndContributionsIpFund | 2,437,000 actg_AccruedExpensesAndContributionsIpFund |  |
Total liabilities, IP Fund | 1,876,000 actg_TotalLiabilitiesIpFund |  |  |  | 2,437,000 actg_TotalLiabilitiesIpFund |  |  |  | 1,876,000 actg_TotalLiabilitiesIpFund | 2,437,000 actg_TotalLiabilitiesIpFund |  |
Net assets, IP Fund | 10,195,000 actg_NetAssetsFundRelated |  |  |  | 12,983,000 actg_NetAssetsFundRelated |  |  |  | 10,195,000 actg_NetAssetsFundRelated | 12,983,000 actg_NetAssetsFundRelated |  |
Revenues, IP Fund |  |  |  |  |  |  |  |  | 1,560,000 actg_RevenuesIPFund | 1,448,000 actg_RevenuesIPFund |  |
IP Fund, Operating expenses |  |  |  |  |  |  |  |  | 1,724,000 actg_IPFundOperatingexpenses | 6,907,000 actg_IPFundOperatingexpenses |  |
IP Fund, Gain from Operations |  |  |  |  |  |  |  |  | (164,000)actg_IPFundGainfromOperations | (5,459,000)actg_IPFundGainfromOperations |  |
IP Fund, Net Loss in Equity Method Investment |  |  |  |  |  |  |  |  | (1,807,000)actg_IPFundNetLossinEquityMethodInvestment | (542,000)actg_IPFundNetLossinEquityMethodInvestment |  |
IP Fund, Net Loss |  |  |  |  |  |  |  |  | $ (1,971,000)actg_IPFundNetLoss | $ (6,001,000)actg_IPFundNetLoss |  |

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- Details
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