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Accrued Liabilities | 3 Months Ended
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Mar. 31, 2014
Accrued Liabilities | Note 7. 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 The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph a -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 24 -Article 5 + Details
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