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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
shares in Thousands
Dec. 31, 2020
Dec. 31, 2019
CONSOLIDATED BALANCE SHEETS    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized 1,000 1,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 30,000 30,000
Common stock, shares issued 6,601 6,563
Common stock, shares outstanding 6,601 6,563