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Note 12 - Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred tax assets: |  |
Inventory (excluding LIFO reserve) | $ 1,690 | $ 2,531
Net operating loss and tax credit carryforwards | 3,520 | 3,224
Allowance for doubtful accounts | 419 | 533
Accrued expenses | 5,684 | 7,228
Other | 143 | 169
Deferred tax assets before valuation allowance | 11,456 | 13,685
Valuation allowance | (2,379) | (2,017)
Total deferred tax assets | 9,077 | 11,668
Deferred tax liabilities: |  |
LIFO reserve | (3,958) | (5,874)
Property and equipment | (11,363) | (19,846)
Intangibles | (5,901) | (9,067)
Total deferred tax liabilities | (21,222) | (34,787)
Deferred tax liabilities, net | $ (12,145) | $ (23,119)

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