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Consolidated Statements of Cash Flows Statement (USD $) | 9 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011
Cash flows from operating activities: |  |
Net income (loss) including noncontrolling interests in operating subsidiaries | $ 49,567,000 | $ 25,941,000
Adjustments to reconcile net income including noncontrolling interests in operating subsidiaries to net cash provided by operating activities: |  |
Depreciation and amortization | 21,034,000 | 8,393,000
Non-cash stock compensation | 17,375,000 | 9,891,000
Change in valuation allowance | (10,237,000) | 0
Other | 490,000 | (15,000)
Changes in assets and liabilities: |  |
Accounts receivable | (13,720,000) | (24,573,000)
Prepaid expenses and other assets | (1,485,000) | 949,000
Accounts payable and accrued expenses / costs | 2,690,000 | (737,000)
Royalties and contingent legal fees payable | (2,030,000) | 24,290,000
Deferred income tax | (6,546,000) | 0
Net cash provided by operating activities | 70,230,000 | 44,139,000
Cash flows from investing activities: |  |
Purchases of property and equipment | (200,000) | (172,000)
Purchase of available-for-sale investments | (305,007,000) | (8,427,000)
Maturities and sale of available-for-sale investments | 169,016,000 | 60,000
Purchase of ADAPTIX, Inc., net of cash acquired | (150,000,000) | 0
Patent acquisition costs | (64,960,000) | (2,805,000)
Net cash used in investing activities | (351,151,000) | (11,344,000)
Cash flows from financing activities: |  |
Proceeds from sale of common stock, net of issuance costs | 218,983,000 | 175,232,000
Distributions to noncontrolling interests in operating subsidiary | (312,000) | (2,897,000)
Contributions from noncontrolling interests in operating subsidiary | 3,840,000 | 877,000
Excess tax benefits from stock-based compensation | 7,554,000 | 1,730,000
Proceeds from exercises of stock options | 274,000 | 411,000
Net cash provided by financing activities | 230,339,000 | 175,353,000
(Decrease) increase in cash and cash equivalents | (50,582,000) | 208,148,000
Cash and cash equivalents, beginning | 314,733,000 | 102,515,000
Cash and cash equivalents, ending | $ 264,151,000 | $ 310,663,000

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