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Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2012
Accrued Liabilities [Abstract] |
Components of accrued liabilities | The components of accrued liabilities are summarized below (in thousands):
| As of December 31,
| 2012 | 2011
Accrued compensation and related charges | $ 2,066 | $ 1,807
Current portion of royalty payments | 800 | 1,375
Accrued income taxes | 640 | 306
Accrued professional services | 609 | 650
Accrued product warranty | 588 | 1,003
Loan commitment for related party notes receivable | — | 868
Other accrued liabilities | 2,499 | 1,588
| $ 7,202 | $ 7,597

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