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Accrued Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2016
Accrued Liabilities |
Components of accrued liabilities | The components of accrued liabilities are summarized below (in thousands):
|  | June 30, |  | December 31, |
|  | 2016 |  | 2015 |
Accrued compensation and related charges |  | $ | 1,758 |  | $ | 2,129 |
Current portion of royalty payments |  |  | 575 |  |  | 575 |
Dividends payable by consolidated joint ventures |  |  | 522 |  |  | 534 |
Accrued professional services |  |  | 407 |  |  | 709 |
Accrued product warranty |  |  | 330 |  |  | 497 |
Accrued income taxes |  |  | 155 |  |  | 225 |
Other accrued liabilities |  |  | 1,624 |  |  | 1,712 |
|  | $ | 5,371 |  | $ | 6,381 |

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