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Consolidated Statements of Comprehensive Income (Loss) (Parentheticals) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Income tax benefit (expense) included in unrealized gain on short-term investments | $ 323 | $ 0 | $ (9) | $ 0

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- Definition Income tax included in unrealized gain on short-term investments + References No definition available. + Details
Name: | actg_IncomeTaxIncludedInUnrealizedGainOnShortTermInvestments
Namespace Prefix: | actg_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration