Note 12 - Earnings Per Share - Reconciliation of Basic and Diluted Loss Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 01, 2019	May 26, 2018	Jun. 01, 2019	May 26, 2018
Basic earnings (loss) per share, net income (loss)	$ 445,000	$ 4,289,000	$ 1,053,000	$ 3,376,000
Basic earnings (loss) per share, weighted average shares (in shares)	10,433,492	10,701,154	10,444,306	10,693,815
Basic earnings per share (in dollars per share)	$ 0.04	$ 0.40	$ 0.10	$ 0.32
Options and restricted shares	$ 0	$ 0	$ 0	$ 0
Options and restricted shares, weighted average shares (in shares)	26,329	40,182	27,530	53,936
Options and restricted shares, net income per share (in dollars per share)	$ 0	$ 0	$ 0	$ (0.01)
Diluted earnings per share, net income (loss)	$ 445,000	$ 4,289,000	$ 1,053,000	$ 3,376,000
Diluted earnings per share, weighted average shares (in shares)	10,459,821	10,741,336	10,471,836	10,747,751
Diluted earnings per share (in dollars per share)	$ 0.04	$ 0.40	$ 0.10	$ 0.31