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v2.4.0.8

Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Operating activities |  |
Net loss | $ (53,664) | $ (49,406)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 986 | 898
Gain on disposal of property and equipment | 4 | 6
Accretion of discounts and amortization of premiums of marketable securities | 692 | 970
Interest associated with long-term note payable to Holdings |  | 1,642
Unoccupied facility expense | 918 |
Stock compensation expense | 10,847 | 6,294
Changes in operating assets and liabilities: |  |
Accounts receivable | (1,154) | 5,842
Prepaid expenses and other current assets | 932 | (1,289)
Restricted cash and other assets | 166 | (74)
Accounts payable | (877) | (462)
Accrued liabilities and other long term liabilities | (2,489) | 1,011
Deferred revenues | (3,191) | (1,649)
Net cash used in operating activities | (46,830) | (36,217)
Investing activities |  |
Purchases of marketable securities | (48,573) | (169,634)
Proceeds from maturities of marketable securities | 101,105 | 127,085
Purchases of property and equipment, net | (1,316) | (1,727)
Net cash provided by (used in) investing activities | 51,216 | (44,276)
Financing activities |  |
Payments and proceeds from issuances of common stock and warrants, net of issuance costs | (143) | 71,124
Proceeds from exercise of stock options and restricted stock awards | 30 | 1,789
Proceeds from employee stock purchase plan | 224 | 307
Net cash provided by financing activities | 111 | 73,220
Effect of exchange rate on cash and cash equivalents | 95 | (18)
Net increase (decrease) in cash and cash equivalents | 4,592 | (7,291)
Cash and cash equivalents at beginning of year | 7,599 | 31,941
Cash and cash equivalents at end of year | 12,191 | 24,650
Non-cash investing and financing activities: |  |
Disposal of fully depreciated property and equipment | 8 | 29
Net change in unrealized gain on marketable securities | $ (23) | $ 32

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