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Accrued expenses and other current liabilities (Tables) | 6 Months Ended
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Jun. 30, 2013
Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities are comprised of the following (in thousands):
|  | June 30, 2013 |  |  | December 31, 2012 |
Salary and related expenses |  | $ | 8,146 |  |  | $ | 10,074 |
Research and clinical trial costs |  |  | 6,558 |  |  |  | 5,995 |
Accrued interest |  |  | 7,911 |  |  |  | 4,533 |
Construction in progress |  |  | 2,661 |  |  |  | 3,878 |
Other |  |  | 1,708 |  |  |  | 1,297 |
Accrued expenses and other current liabilities |  | $ | 26,984 |  |  | $ | 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
Period Type: | duration