Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Aug. 31, 2019	Dec. 01, 2018
Trade receivables, allowances	$ 12,918	$ 14,017
Preferred stock, shares authorized (in shares)	10,045,900	10,045,900
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Common stock, shares outstanding (in shares)	50,953,845	50,732,796