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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Consolidated Balance Sheets [Abstract]    
Accounts receivable-trade, allowance $ 393 $ 453
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 7,828,509 7,752,965
Common stock, shares outstanding 7,828,509 7,752,965
Retained earnings, accumulated statutory reserves in equity method investments $ 1,284 $ 945