Note 12 - Earnings Per Share - Reconciliation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	May 26, 2018	May 27, 2017	May 26, 2018	May 27, 2017
Basic earnings (loss) per share, net income (loss)	$ 4,289	$ 5,842	$ 3,376	$ 8,703
Basic earnings (loss) per share, weighted average shares (in shares)	10,701,154	10,648,033	10,693,815	10,630,836
Basic earnings per share (in dollars per share)	$ 0.40	$ 0.55	$ 0.32	$ 0.82
Options and restricted shares, weighted average shares (in shares)	40,182	74,293	53,936	88,009
Options and restricted shares, net income per share (in dollars per share)		$ (0.01)	$ (0.01)	$ (0.01)
Diluted earnings (loss) per share, net income (loss)	$ 4,289	$ 5,842	$ 3,376	$ 8,703
Diluted earnings (loss) per share, weighted average shares (in shares)	10,741,336	10,722,326	10,747,751	10,718,845
Diluted earnings per share (in dollars per share)	$ 0.40	$ 0.54	$ 0.31	$ 0.81