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Note 4 - Inventories (Details) - Inventories (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventories [Abstract]    
Raw materials $ 1,904 $ 1,673
Work in progress 85 26
Finished goods 115 74
Total $ 2,104 $ 1,773 [1]
[1] Derived from the audited December 31, 2012 financial statements