Consolidated Condensed Balance Sheets (Parentheticals) - $ / shares	Jun. 26, 2021	Dec. 26, 2020
Common stock, par value	$ 3.00	$ 3.00
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	14,795,617	14,557,435
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	1,004,975	880,313