Quarterly report pursuant to Section 13 or 15(d)

CONDENSED STATEMENTS OF CASH FLOWS

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CONDENSED STATEMENTS OF CASH FLOWS (USD $)
In Thousands
 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Operating activities    
Net (loss) income $ (42,255) $ 4,696
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:    
Depreciation and amortization 923 597
Stock-based compensation expense 7,037 8,868
Changes in assets and liabilities:    
Prepaid expenses and other current assets (841) (3)
Other assets 105 115
Accounts payable 58 (105)
Accrued compensation (1,459) (3,807)
Other accrued liabilities (1,805) 1,278
Deferred revenue 105 47,283
Deferred rent and other long term liabilities 204 (3,439)
Net cash (used in) provided by operating activities (37,928) 55,483
Investing activities    
Purchases of available-for-sale securities (214,929) (114,849)
Maturities and sales of available-for-sale securities 147,300 78,265
Capital expenditures (1,557) (1,735)
Net cash used in investing activities (69,186) (38,319)
Financing activities    
Payments on capital lease obligations (485) (610)
Net proceeds from issuances of common stock 141,674 958
Net cash provided by financing activities 141,189 348
Net increase in cash and cash equivalents 34,075 17,512
Cash and cash equivalents at beginning of period 8,877 14,717
Cash and cash equivalents at end of period 42,952 32,229
Supplemental disclosure of cash flow information    
Interest paid $ 17 $ 52