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Note 9 - Due from related parties (Details) - Due from related parties (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Related Party Transaction [Line Items]    
Due from related parties, current $ 375 $ 210
Beijing Fengshangyinli Technology [Member]
   
Related Party Transaction [Line Items]    
Due from related parties, current 45 53
Beijing Saimeiwei Food Equipment Technology [Member]
   
Related Party Transaction [Line Items]    
Due from related parties, current 216 87
Beijing Telijie Century Environmental Technology [Member]
   
Related Party Transaction [Line Items]    
Due from related parties, current $ 114 $ 70