Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
STOCKHOLDERS' EQUITY
Accounts receivable, allowance	$ 842	$ 1,061
Common stock, par value	$ 2.50	$ 2.50
Common stock, shares authorized	8,000,000	8,000,000
Common stock, shares issued	5,112,878	5,083,051
Common stock, shares outstanding	3,568,006	3,538,179
Treasury stock, shares	1,544,872	1,544,872