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Note 3 - Inventories (Details) - Composition of inventories (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Composition of inventories [Abstract]
Raw materials	$ 16,346	$ 15,023
Work in process	3,470	4,863
Finished goods	11,205	10,484
	$ 31,021	$ 30,370

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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