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Accrued Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2014
Accrued Liabilities | Accrued liabilities at September 30, 2014 and December 31, 2013, consisted of the following (in thousands):
|  | September 30, |  |  | December 31, |  |  |
|  | 2014 |  |  | 2013 |  |  |
Accrued compensation and related costs |  | $ | 2,956 |  |  | $ | 2,527 |  |  |
Accrued inventory costs |  |  | 4,610 |  |  |  | 3,553 |  |  |
Accrued professional services |  |  | 2,928 |  |  |  | 2,722 |  |  |
Other accrued expenses |  |  | 2,053 |  |  |  | 1,011 |  |  |
Total accrued liabilities |  | $ | 12,547 |  |  | $ | 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
Period Type: | duration