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Note 2 - Inventory (Details) - Carrying Values of Inventory (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
At average cost (approximates current cost)
Finished goods	$ 20,601	$ 13,590
Work in process	2,265	1,569
Raw materials and supplies	29,137	36,292
	52,003	51,451
LIFO reserve	(9,520)	(9,287)
Total inventory	$ 42,483	$ 42,164

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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