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INCOME TAXES - Deferred income tax assets and liabilities (Details 2) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred tax assets: |  |
Allowance for doubtful accounts | $ 78 | $ 94
Accruals and reserves | 3,468 | 3,767
Other | 179 | 222
Total deferred tax assets | 3,725 | 4,083
Deferred tax liabilities: |  |
Property, plant, and equipment | 2,499 | 2,184
Total deferred tax liabilities | 2,499 | 2,184
Net deferred tax asset | $ 1,226 | $ 1,899

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