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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Cash flows from operating activities:    
Net income (loss) $ 32,559 $ (33,824)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Depreciation and amortization 1,061 1,751
Expenses for share-based compensation awards 3,273 4,817
Changes in assets and liabilities:    
(Increase) decrease in accounts receivable (3,176) 1,437
Decrease (increase) in other current assets 656 (258)
Decrease in other assets 1,050 1,667
Decrease in accounts payable and accrued expenses (3,640) (358)
Increase in deferred revenue - current 204 0
Increase in deferred revenue - long term 264 0
(Decrease) increase in other liabilities (91) 1,313
Net cash provided by (used in) operating activities 32,160 (23,455)
Cash flows from investing activities:    
Capital expenditures (92) (1,284)
Sales/maturities of marketable securities 100 1,700
Net cash provided by investing activities 8 416
Cash flows from financing activities:    
Proceeds from the exercise of stock options and sale of common stock under the Employee Stock Purchase Plan 2,319 2,104
Net cash provided by financing activities 2,319 2,104
Net increase (decrease) in cash and cash equivalents 34,487 (20,935)
Cash and cash equivalents at beginning of period 47,918 90,903
Cash and cash equivalents at end of period $ 82,405 $ 69,968