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Note 4 - Inventories (Details) - Inventories (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Inventories [Abstract]    
Raw materials $ 2,201 $ 2,172
Work in progress 21 271
Finished goods 501 426
Total $ 2,723 $ 2,869 [1]
[1] Derived from the audited December 31, 2013 financial statements