Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Feb. 29, 2020	Nov. 30, 2019
Trade receivables, allowances	$ 11,845	$ 10,682
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)	51,407,204	51,241,190