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Consolidated Balance Sheets (Parenthetical) - $ / shares
Mar. 31, 2021
Dec. 31, 2020
Consolidated Balance Sheets [Abstract]    
Preferred Stock, No Par Value
Preferred Stock, Shares Authorized 5,000,000 5,000,000
Preferred Stock, Shares Issued 0 0
Common Stock, Par Value Per Share $ 0.10 $ 0.10
Common Stock, Shares Authorized 20,000,000 20,000,000
Common Stock, Shares, Issued 8,240,081 8,236,331
Treasury Stock, Shares 21,568 10,263