Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
STOCKHOLDERS' EQUITY
Accounts receivable, allowance	$ 678	$ 567
Common stock, par value	$ 2.50	$ 2.50
Common stock, shares authorized	8,000,000	8,000,000
Common stock, shares issued	5,206,752	5,190,072
Common stock, shares outstanding	3,661,880	3,645,200
Treasury stock, shares	1,544,872	1,544,872