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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock-Based Compensation Expense | The following table shows total stock-based compensation expense included in the condensed consolidated statement of operations for the three month and nine months ended September 30, 2013 and 2012 (in thousands):
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  | $ | 732 |  |  | $ | 774 |  |  | $ | 2,140 |  |  | $ | 2,195 |
General and administrative |  |  | 659 |  |  |  | 630 |  |  |  | 1,958 |  |  |  | 1,816 |
Total stock-based compensation expense |  | $ | 1,391 |  |  | $ | 1,404 |  |  | $ | 4,098 |  |  | $ | 4,011 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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