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Accrued Liabilities (Tables) | 3 Months Ended
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Mar. 31, 2013
Accrued Liabilities [Abstract] |
Components of accrued liabilities | The components of accrued liabilities are summarized below (in thousands):
|  | March 31, |  |  | December 31, |
|  | 2013 |  |  | 2012 |
Dividends payable by consolidated joint ventures |  | $ | 2,365 |  |  | $ | — |
Accrued compensation and related charges |  |  | 1,424 |  |  |  | 2,066 |
Current portion of royalty payments |  |  | 800 |  |  |  | 800 |
Accrued income taxes |  |  | 521 |  |  |  | 640 |
Accrued professional services |  |  | 312 |  |  |  | 609 |
Accrued product warranty |  |  | 749 |  |  |  | 588 |
Other accrued liabilities |  |  | 3,263 |  |  |  | 2,499 |
|  | $ | 9,434 |  |  | $ | 7,202 |

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