CONSOLIDATED CONDENSED BALANCE SHEETS (Parentheticals) - $ / shares	Apr. 01, 2023	Dec. 31, 2022
Common Class A
Common stock, par value (in dollars per share)	$ 3	$ 3
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	14,405,501	14,453,466
Common stock, shares outstanding (in shares)	14,405,501	14,453,466
Common Class B
Common stock, par value (in dollars per share)	$ 3	$ 3
Common stock, shares authorized (in shares)	16,000,000	16,000,000
Common stock, shares issued (in shares)	1,121,129	1,129,158
Common stock, shares outstanding (in shares)	1,121,129	1,129,158