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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Sep. 30, 2019
Dec. 31, 2018
Statement Of Financial Position [Abstract]    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 20,000,000 20,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 120,000,000 120,000,000
Common stock, shares issued 2,178,000 2,148,000
Common stock, shares outstanding 2,178,000 2,148,000