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Accrued Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2018
Accrued Liabilities |
Components of accrued liabilities | The components of accrued liabilities are summarized below (in thousands):
|  | September 30, |  | December 31, |
|  | 2018 |  | 2017 |
Preferred stock dividends payable |  |  | 2,901 |  |  | 2,901 |
Accrued compensation and related charges |  |  | 2,570 |  |  | 3,205 |
Payable in connection with repurchase of subsidiaries shares |  |  | 1,192 |  |  | — |
Advance from customers |  |  | 648 |  |  | 924 |
Accrued professional services |  |  | 618 |  |  | 583 |
Dividends payable by consolidated joint ventures |  |  | 505 |  |  | 533 |
Other tax payable |  |  | 352 |  |  | 395 |
Accrued income taxes |  |  | 260 |  |  | 270 |
Accrued product warranty |  |  | 228 |  |  | 133 |
Other personnel related costs |  |  | 227 |  |  | 230 |
Current portion of royalty payments |  |  | 144 |  |  | 575 |
Accrual for sales refund liabilities |  |  | 37 |  |  | — |
Other accrued liabilities |  |  | 3,094 |  |  | 1,400 |
|  | $ | 12,776 |  | $ | 11,149 |

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