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Note 3 - Inventories (Details) - Composition of inventories (USD $) In Thousands, unless otherwise specified	Sep. 29, 2013	Dec. 31, 2012
Composition of inventories [Abstract]
Raw materials	$ 16,458	$ 15,023
Work in process	3,353	4,863
Finished goods	8,018	10,484
	$ 27,829	$ 30,370

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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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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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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