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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Statement Of Financial Position [Abstract]    
Accounts receivable-trade, allowance $ 315 $ 327
Inventories, allowance 65 40
Redeemable convertible preferred stock, Series A, discount 731 764
Redeemable convertible preferred stock, par value $ 0.001 $ 0.001
Redeemable convertible preferred stock, shares authorized 1,000,000 1,000,000
Redeemable convertible preferred stock, shares issued 1,000,000 1,000,000
Redeemable convertible preferred stock, shares outstanding 1,000,000 1,000,000
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 8,184,188 8,184,188
Common stock, shares outstanding 8,008,759 8,008,759
Treasury stock, shares 108,976 49,863
Retained earnings; accumulated statutory reserves in equity method investments $ 1,857 $ 1,857