Note 7 - Earnings Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 03, 2019	Nov. 25, 2018	Aug. 26, 2018	May 27, 2018	Feb. 25, 2018	Nov. 26, 2017	Aug. 27, 2017	May 28, 2017	Mar. 03, 2019	Feb. 25, 2018	Feb. 26, 2017
Net earnings (loss) - continuing operations	$ 1,588	$ 2,078	$ 1,824	$ 816	$ 17,197	$ 344	$ 859	$ 72	$ 6,306	$ 18,472	$ (1,094)
Net earnings - discontinued operations	102,398	1,613	876	2,352	768	372	(339)	1,322	107,239	2,123	10,377
Net earnings	$ 103,986	$ 3,691	$ 2,700	$ 3,168	$ 17,965	$ 716	$ 520	$ 1,394	$ 113,545	$ 20,595	$ 9,283
Weighted average common shares outstanding for basic EPS (in shares)	20,370	20,278	20,253	20,242	20,238	20,237	20,236	20,235	20,288	20,237	20,235
Net effect of dilutive options (in shares)									97	30	4
Weighted average shares outstanding for diluted EPS (in shares)	20,501	20,352	20,382	20,296	20,311	20,261	20,250	20,244	20,385	20,267	20,239
Basic earnings (loss) per share - continuing operations (in dollars per share)	$ 0.08	$ 0.10	$ 0.09	$ 0.04	$ 0.85	$ 0.02	$ 0.04		$ 0.31	$ 0.91	$ (0.05)
Basic earnings per share - discontinued operations (in dollars per share)	5.02	0.08	0.04	0.12	0.04	0.02	(0.02)	0.07	5.29	0.11	0.51
Basic earnings per share (in dollars per share)	5.10	0.18	0.13	0.16	0.89	0.04	0.02	0.07	5.60	1.02	0.46
Diluted earnings (loss) per share - continuing operations (in dollars per share)	0.08	0.10	0.09	0.04	0.85	0.02	0.04		0.31	0.91	(0.05)
Diluted earnings per share - discontinued operations (in dollars per share)	4.99	0.08	0.04	0.12	0.04	0.02	(0.02)	0.07	5.26	0.11	0.51
Diluted earnings per share (in dollars per share)	$ 5.07	$ 0.18	$ 0.13	$ 0.16	$ 0.89	$ 0.04	$ 0.02	$ 0.07	$ 5.57	$ 1.02	$ 0.46