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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Accounts receivable, less allowance for doubtful accounts $ 798 $ 654
Preferred stock, par value in USD per share) $ 1 $ 1
Preferred stock, shares authorized (in shares) 500,000 500,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in USD per share) $ 1 $ 1
Common stock, shares authorized (in shares) 35,000,000 35,000,000
Common stock, shares issued (in shares) 9,363,093 9,287,625
Common stock, shares outstanding (in shares) 9,115,584 9,061,039
Treasury stock (in shares) 247,509 226,586