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Accrued Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2013
Accrued Liabilities | Accrued liabilities at June 30, 2013, and December 31, 2012, consisted of the following (in thousands):
|  | June 30, |  |  | December 31, |
|  | 2013 |  |  | 2012 |
Accrued compensation and related costs |  | $ | 1,985 |  |  | $ | 2,692 |
Accrued inventory costs |  |  | 3,305 |  |  |  | 2,352 |
Accrued contract and other accrued expenses |  |  | 3,458 |  |  |  | 2,575 |
Total accrued liabilities |  | $ | 8,748 |  |  | $ | 7,619 |

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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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