Note 13 - Reconciliation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 27, 2016	Aug. 29, 2015	Aug. 27, 2016	Aug. 29, 2015
Basic earnings per share	$ 4,165	$ 4,266	$ 10,784	$ 14,751
Basic earnings per share (in shares)	10,739,006	10,816,293	10,762,106	10,658,416
Basic earnings per share (in dollars per share)	$ 0.39	$ 0.39	$ 1	$ 1.38
Options and restricted shares (in shares)	139,661	116,575	139,834	153,787
Options and restricted shares (in dollars per share)	$ (0.01)		$ (0.01)	$ (0.02)
Diluted earnings per share	$ 4,165	$ 4,266	$ 10,784	$ 14,751
Diluted earnings per share (in shares)	10,878,667	10,932,868	10,901,940	10,812,203
Diluted earnings per share (in dollars per share)	$ 0.38	$ 0.39	$ 0.99	$ 1.36