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Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2012
Accrued Liabilities | Accrued liabilities at December 31, 2012 and 2011 consisted of the following (in thousands):
|  | December 31, |
|  | 2012 |  |  | 2011 |
Accrued compensation and related costs |  | $ | 2,692 |  |  | $ | 2,027 |
Accrued inventory costs |  |  | 2,352 |  |  |  | 1,417 |
Accrued contract and other accrued expenses |  |  | 2,575 |  |  |  | 2,381 |
Total accrued liabilities |  | $ | 7,619 |  |  | $ | 5,825 |

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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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