Consolidated Condensed Balance Sheets (Parentheticals) - $ / shares	Mar. 28, 2020	Dec. 28, 2019
Common stock, par value	$ 3.00	$ 3.00
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	14,936,833	15,025,087
Class B Common stock, par value	$ 3.00	$ 3.00
Class B Common stock, shares authorized	16,000,000	16,000,000
Class B Common stock, shares issued	880,313	836,669