Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Nov. 30, 2019	Nov. 24, 2018
Allowance for doubtful accounts	$ 815	$ 754
Common stock, par value (in dollars per share)	$ 5	$ 5
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	10,116,290	10,527,636
Common stock, shares outstanding (in shares)	10,116,290	10,527,636