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CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares
Jun. 30, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, authorized 10,000,000 10,000,000
Common stock, issued 4,173,675 4,173,675
Common stock, outstanding 4,168,414 4,168,414
Treasury stock 5,261 5,261