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Accrued Liabilities (Tables) | 3 Months Ended
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Mar. 31, 2014
Accrued Liabilities | Accrued liabilities at March 31, 2014 and December 31, 2013 consisted of the following (in thousands):
|  | March 31, 2014 |  |  | December 31, 2013 |
Accrued compensation and related costs |  | $ | 1,899 |  |  | $ | 2,527 |
Accrued inventory costs |  |  | 2,534 |  |  |  | 3,553 |
Accrued professional services |  |  | 2,995 |  |  |  | 2,722 |
Other accrued expenses |  |  | 1,410 |  |  |  | 1,011 |
Total accrued liabilities |  | $ | 8,838 |  |  | $ | 9,813 |

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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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