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Accrued expenses and other current liabilities (Tables) | 12 Months Ended
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Dec. 31, 2012
Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities are comprised of the following (in thousands):
|  | December 31, |
|  | 2011 |  |  | 2012 |
Salary and related expenses |  | $ | 8,997 |  |  | $ | 10,074 |
Research and clinical trial costs |  |  | 2,383 |  |  |  | 5,995 |
Accrued interest |  |  | 8,262 |  |  |  | 4,533 |
Construction in progress |  |  | — |  |  |  | 3,878 |
Other |  |  | 1,094 |  |  |  | 1,297 |
Accrued expenses and other current liabilities |  | $ | 20,736 |  |  | $ | 25,777 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
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