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Note 4 - Inventories (Details) - Inventories (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Inventories [Abstract]    
Raw materials $ 2,081 $ 1,673
Work in progress 162 26
Finished goods 280 74
Total $ 2,523 $ 1,773 [1]
[1] Derived from the audited December 31, 2012 financial statements