Commitments and Contingencies Other (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Noncontrolling Interest [Line Items]
partners capital authorized		$ 250,000,000
Fund net assets	$ 4,442,000	$ 4,706,000

Authorized amount of capital to be raised by the fund.

No definition available.

Name:	actg_PartnersCapitalAuthorized
Namespace Prefix:	actg_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant