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ACCRUED EXPENSES AND OTHER LIABILITIES (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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ACCRUED EXPENSES AND OTHER LIABILITIES |  |
Accrued payroll and related expenses | $ 3,021 | $ 3,257
Accrued sales incentives and discounts | 3,716 | 3,547
Accrued warranty costs | 5,410 | 5,607
Deferred revenue | 295 | 496
Other | 713 | 587
Total accrued expenses and other liabilities | $ 13,155 | $ 13,494

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