ACCRUED LIABILITIES Accrued current liabilities consisted of the following (in thousands): | | | | | | | | | | At December 31, | | 2015 | | 2014 | | | | | Accrued sales commissions and incentives | $ | 1,005 |
| | $ | 91 |
| Accrued warranty expense | 314 |
| | 81 |
| Accrued legal and professional fees | 151 |
| | 91 |
| Accrued payroll and related benefits | 1,243 |
| | 541 |
| Separation accrual | 96 |
| | 130 |
| Accrued income taxes | 26 |
| | — |
| Accrued other taxes | 65 |
| | 8 |
| Accrued other expenses | 17 |
| | 20 |
| Total accrued liabilities | $ | 2,917 |
| | $ | 962 |
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