Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies (Details) - Diluted Net Income Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	May 25, 2014	Feb. 23, 2014	Nov. 24, 2013	Aug. 25, 2013	May 26, 2013	Feb. 24, 2013	Nov. 25, 2012	Aug. 26, 2012	May 27, 2012	Feb. 26, 2012	Nov. 27, 2011	Aug. 28, 2011	May 25, 2014	May 26, 2013	May 27, 2012
Diluted Net Income Per Share [Abstract]
Net income applicable to Common Stockholders (in Dollars)													$ 19,145	$ 22,587	$ 12,696
Denominator:
Weighted average shares for basic net income per share													26,628	25,830	25,849
Stock options and restricted stock units													492	796	277
Weighted average shares for diluted net income per share													27,120	26,626	26,126
Diluted net income per share (in Dollars per share)	$ 0.17	$ 0.24	$ 0.13	$ 0.18	$ 0.17	$ 0.18	$ 0.34	$ 0.17	$ 0.11	$ 0.18	$ 0.13	$ 0.07	$ 0.71	$ 0.85	$ 0.49