Note 4 - Product Inventories (Details) - Product Inventories (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Product Inventories [Abstract]
Raw materials	$ 1,784	$ 2,337
Work in process	1,783	3,666
Finished goods	1,199	1,413
Total product inventories	$ 4,766	$ 7,416

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

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-Publisher SEC

-Name Regulation S-X (SX)

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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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-Name Regulation S-X (SX)

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