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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011
Cash flows from operating activities: |  |  |
Net loss | $ (73,431) |  | $ (21,008)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation | 3,308 |  | 4,052
Common stock contribution to 401(k) | 1,134 |  | 1,046
Stock-based compensation expense | 3,368 |  | 5,598
Accrued interest on interest bearing obligations | 878 |  | 762
Revaluation of contingent warrant liabilities | 25,746 |  | (3,349)
Restructuring charge related to long-lived assets | 2,241 |  | 0
Amortization of debt discount and final payment fee on debt and debt issuance costs | 1,388 |  | 1,019
Unrealized (gain) loss on foreign currency exchange | (88) |  | 1,136
Unrealized loss (gain) on foreign exchange options | 721 |  | (157)
Other non-cash adjustments | 17 |  | 47
Changes in assets and liabilities: |  |  |
Trade and other receivables, net | 5,251 |  | 5,964
Prepaid expenses and other assets | (421) |  | (1,850)
Accounts payable and accrued liabilities | 3,451 |  | (1,305)
Deferred revenue | (2,948) |  | (13,008)
Other liabilities | (47) |  | 78
Net cash used in operating activities | (29,432) |  | (20,975)
Cash flows from investing activities: |  |  |
Purchases of investments | (16,988) |  | 0
Net purchase of property and equipment | (2,097) |  | (2,586)
Proceeds from Sale of property and equipment | 452 |  | 0
Net cash used in investing activities | (18,633) |  | (2,586)
Cash flows from financing activities: |  |  |
Proceeds from issuance of common stock, net of issuance costs | 39,624 |  | 12,435
Proceeds from issuance of long-term debt, net of issuance costs | 4,439 |  | 20,102
Principal payments of debt | (2,143) |  | 0
Net cash provided by financing activities | 41,920 |  | 32,537
Effect of exchange rate changes on cash | 0 |  | (573)
Net increase in cash and cash equivalents | (6,145) |  | 8,976
Cash and cash equivalents at the beginning of the period | 48,344 | [1] | 37,304
Cash and cash equivalents at the end of the period | 42,199 |  | 45,707
Cash paid for: |  |  |
Interest | 723 |  | 0
Income taxes | 0 |  | 15
Non-cash investing and financing activities: |  |  |
Discount on long-term debt | (55) |  | (8,899)
Issuance of contingent warrant liabilities | 6,053 |  | 0
Interest added to principal balances on long-term debt | $ 941 |  | $ 500
[1] | The condensed consolidated balance sheet as of December 31, 2011 has been derived from the audited financial statements as of that date included in the Company's Annual Report on Form 10-K for the year ended December 31, 2011.

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