v2.4.0.6
Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Operating activities      
Net loss $ (44,746) $ (55,170) $ (53,524)
Adjustments to reconcile net loss to cash used in operating activities:      
Depreciation and amortization 3,759 2,437 2,373
Share-based compensation 13,513 9,441 8,366
Non-cash restructuring charge 0 0 (362)
Accretion and amortization related to investments, net 909 721 891
Accretion of non-cash interest expense related to convertible notes 0 1,059 4,861
Loss on debt extinguishment upon conversion of convertible debt 0 8,490 0
Amortization of debt issuance costs 0 36 246
Loss on disposal of equipment 22 101 0
Changes in operating assets and liabilities:      
Accounts receivable (5,876) (3,181) (2,372)
Inventory (59) (5,471) (195)
Prepaid and other assets 1,238 1,288 (1,004)
Restricted cash 775 700 1,856
Accounts payable and accrued liabilities 996 (432) 1,508
Accrued payroll and related expenses 1,074 1,324 2,291
Deferred revenue (1,652) (4,221) (4,275)
Deferred rent and other liabilities (79) 202 (49)
Net cash used in operating activities (30,126) (42,676) (39,389)
Investing activities      
Purchase of available-for-sale marketable securities (102,655) (73,447) (65,270)
Proceeds from the maturity of available-for-sale marketable securities 64,286 54,691 53,856
Purchase of property and equipment (8,006) (6,860) (2,992)
Proceeds from the sale of equipment 4 6 302
Net cash (used in) provided by investing activities (46,371) (25,610) (14,104)
Financing activities      
Net proceeds from issuance of common stock 74,709 70,546 46,310
Repayment of equipment loan (525) (900) (1,931)
Net cash provided by financing activities 74,184 69,646 44,379
Effect of exchange rate changes on cash and cash equivalents (23) (48) (9)
Increase (decrease) in cash and cash equivalents (2,336) 1,312 (9,123)
Cash and cash equivalents, beginning of year 4,889 3,577 12,700
Cash and cash equivalents, ending of year 2,553 4,889 3,577
Supplemental disclosure of cash flow information:      
Cash paid during the year for interest 6 357 2,932
Non-cash investing and financing transactions:      
Unrealized gain (loss) on marketable securities 9 (5) (54)
Conversion of convertible notes to common stock $ 0 $ 46,270 $ 0