Supplemental Cash Flow Information	12 Months Ended
Supplemental Cash Flow Information	Dec. 31, 2011
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	SUPPLEMENTAL CASH FLOW INFORMATION Cash paid for state income taxes totaled $185,000, $211,000 and $169,000 for the years ended December 31, 2011, 2010 and 2009, respectively. Foreign taxes withheld totaled $7,586,000, $268,000 and $3,000 for the years ended December 31, 2011, 2010 and 2009. Refer to Note 6 to these notes to consolidated financial statements for information regarding noncash investing activity related to the acquisition of patents for the periods presented. Noncash financing activity for the year ended December 31, 2010 included accrued issuance costs associated with the funding of the Acacia IP Fund totaling $210,000, $117,000 of which was charged to additional-paid-in-capital and $93,000 of which was charged to noncontrolling interests in operating subsidiaries.

The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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