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Sale of Patent Assets	6 Months Ended
	Jun. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Sale of Patent Assets	I) Sale of Patent Assets. On April 26, 2012, we entered into an agreement to sell the portion of our patent portfolio pertaining to wireless technology for $75 million. The transaction closed on June 21, 2012. The proceeds from the sale were reduced by $3.8 million of transaction costs, which consisted primarily of fees from the law firm that assisted us in the sale. We intend to continue to pursue patent monetization alternatives for certain other patents remaining in our patent portfolio. We are unable to predict the size or the timing of any future potential transactions involving such patents or whether such transactions will be completed. We believe that the sale of wireless patents will have no material impact on our biometrics and imaging and DSL service assurance product lines, which we will continue after the patent sale.

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The entire disclosure for all or part of the information related to intangible assets.

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