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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2017
Dec. 31, 2016
Statement of Financial Position [Abstract]    
Common stock, par value $ 0.002731 $ 0.002731
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 17,312,586 17,312,586
Common stock, shares outstanding 17,312,586 17,312,586