Consolidated Condensed Balance Sheets (Parentheticals) - $ / shares	Jul. 01, 2017	Dec. 31, 2016
Common stock, par value	$ 3.00	$ 3.00
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	15,264,441	15,248,338
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	861,499	870,714