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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2014
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 statements of operations for the three and nine months ended September 30, 2014 and 2013 (in thousands):
| Three months ended |  |  | Nine months ended |
| September 30, |  |  | September 30, |
| 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development | $ | 1,182 |  |  | $ | 732 |  |  | $ | 3,418 |  |  | $ | 2,140 |
General and administrative |  | 947 |  |  |  | 659 |  |  |  | 2,747 |  |  |  | 1,958 |
Total stock-based compensation expense | $ | 2,129 |  |  | $ | 1,391 |  |  | $ | 6,165 |  |  | $ | 4,098 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 4: 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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