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Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Accounts receivable, allowance for doubtful accounts $ 163 $ 266
Preferred stock, par value (in dollars per share) $ 1 $ 1
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 9,926
Preferred stock, shares outstanding (in shares) 0 9,926
Common stock, par value (in dollars per share) $ 1 $ 1
Common stock, shares authorized (in shares) 25,000,000 25,000,000
Common stock, shares issued (in shares) 12,121,484 12,121,484
Common stock, shares outstanding (in shares) 7,402,614 6,976,144
Treasury stock, shares (in shares) 4,818,870 5,145,340