Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended												12 Months Ended
	May 29, 2016	Feb. 28, 2016	Nov. 29, 2015	Aug. 30, 2015	May 31, 2015	Mar. 01, 2015	Nov. 30, 2014	Aug. 31, 2014	May 25, 2014	Feb. 23, 2014	Nov. 24, 2013	Aug. 25, 2013	May 29, 2016	May 31, 2015	May 25, 2014
Numerator:
Net (loss) income applicable to Common Stockholders													$ (11,641)	$ 13,544	$ 19,145
Denominator:
Weighted average shares for basic net (loss) income per share (in shares)													27,044	26,884	26,628
Effect of dilutive securities:
Stock options and restricted stock units (in shares)														452	492
Weighted average shares for diluted net (loss) income per share (in shares)													27,044	27,336	27,120
Diluted net (loss) income per share (in dollars per share)	$ 0.17	$ (0.78)	$ 0.07	$ 0.11	$ 0.15	$ 0.14	$ 0.12	$ 0.09	$ 0.17	$ 0.24	$ 0.13	$ 0.18	$ (0.43)	$ 0.50	$ 0.71