Consolidated Statements of Cash Flows Statement (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income including noncontrolling interests in operating subsidiaries	$ 15,395	$ 14,928
Adjustments to reconcile net income including noncontrolling interests in operating subsidiaries to net cash provided by operating activities:
Depreciation and amortization	6,418	3,625
Non-cash stock compensation	6,323	3,959
Gain on investments	(9)	0
Changes in assets and liabilities:
Accounts receivable	(12,379)	2,515
Prepaid expenses and other assets	(63)	(758)
Accounts payable and accrued expenses	(497)	525
Royalties and contingent legal fees payable	9,931	(7,096)
Deferred revenues		(1,510)
Net cash provided by operating activities	25,119	16,188
Cash flows from investing activities:
Purchases of property and equipment	(88)	(28)
Sale of available-for-sale investments	35	0
Patent acquisition costs	(1,805)	(2,279)
Net cash used in investing activities	(1,858)	(2,307)
Cash flows from financing activities:
Proceeds from sale of common stock, net of issuance costs	175,232	0
Distributions to noncontrolling interests in operating subsidiary	(2,897)	(2,788)
Contributions from noncontrolling interests in operating subsidiary	877	0
Excess tax benefits from stock-based compensation	23	0
Proceeds from exercises of stock options	404	4,673
Net cash provided by (used in) financing activities	173,639	1,885
Increase in cash and cash equivalents	196,900	15,766
Cash and Cash Equivalents, beginning	102,515	51,735
Cash and Cash Equivalents, ending	$ 299,415	$ 67,501