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v2.4.0.8

Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Operating activities |  |
Net loss | $ (13,840) | $ (20,825)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 339 | 319
Gain on disposal of property and equipment | (20) |
Accretion of discounts and amortization of premiums of marketable securities | 264 | 280
Unoccupied facility expense | 77 |
Stock-based compensation expense | 1,270 | 4,266
Changes in operating assets and liabilities: |  |
Accounts receivable | (103) | (542)
Prepaid expenses and other current assets | (948) | 835
Restricted cash and other assets | 266 | 13
Accounts payable | 154 | (439)
Accrued liabilities and other long term liabilities | (1,671) | (1,905)
Deferred revenues | 3,036 | (888)
Net cash used in operating activities | (11,176) | (18,886)
Investing activities |  |
Purchases of marketable securities | (13,819) | (13,454)
Proceeds from maturities of marketable securities | 28,949 | 50,340
Purchases of property and equipment, net of proceeds from asset disposals | (398) | (535)
Net cash provided by investing activities | 14,732 | 36,351
Financing activities |  |
Proceeds from issuances of common stock and warrants, net of issuance costs |  | (142)
Proceeds from exercise of stock options and restricted stock awards |  | 10
Proceeds from employee stock purchase plan | 69 | 147
Net cash provided by financing activities | 69 | 15
Effect of exchange rate changes on cash and cash equivalents | 3 | (63)
Net increase in cash and cash equivalents | 3,628 | 17,417
Cash and cash equivalents at beginning of period | 23,122 | 7,599
Cash and cash equivalents at end of period | 26,750 | 25,016
Non-cash investing and financing activities: |  |
Disposal of fully depreciated property and equipment | 274 | 1
Net change in unrealized gain (loss) on marketable securities | $ 69 | $ (8)

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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Data Type: | xbrli:monetaryItemType
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