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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Accounts receivable-trade, allowance $ 204 $ 315
Inventories, allowance 120 73
Redeemable convertible preferred stock, Series A, discount $ 683 $ 719
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 8,252,563 8,185,323
Common stock, shares outstanding 8,252,563 8,185,323
Treasury stock, shares 131,928 111,640
Equity Method Investments    
Retained earnings; accumulated statutory reserves in equity method investments $ 2,605 $ 2,100