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CONDENSED BALANCE SHEETS (Parenthetical) - $ / shares
Sep. 30, 2021
Dec. 31, 2020
CONDENSED BALANCE SHEETS    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 5,714,000 5,714,000
Common stock, shares issued 1,768,000 1,748,000
Common stock, shares outstanding 1,768,000 1,748,000