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INCOME TAXES - Deferred Income Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Deferred tax assets: |  |
Allowance for doubtful accounts | $ 95 | $ 53
Accruals and reserves | 3,390 | 4,024
Other | 96 | 1,067
Total deferred tax assets | 3,581 | 5,144
Deferred tax liabilities: |  |
Property, plant, and equipment | 1,758 | 2,110
Total deferred tax liabilities | 1,758 | 2,110
Net deferred tax asset | $ 1,823 | $ 3,034

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