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Note 9 - Due from related parties (Detail) - Due from related parties (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Due from related parties, current $ 260 $ 210
Beijing Fengshangyinli Technology [Member]
   
Due from related parties, current 46 53
Beijing Saimeiwei Food Equipment Technology [Member]
   
Due from related parties, current 134 87
Beijing Telijie Century Environmental Technology [Member]
   
Due from related parties, current $ 80 $ 70