Note 2 - Loss Per Share - Weighted-average Common and Dilutive Potential Common Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 05, 2017	Aug. 30, 2016
Net loss	$ (9,846)	$ (39,692)
Basic (in shares)	60,411	59,790
Dilutive effect of stock options and restricted stock (in shares)
Weighted average common and dilutive potential common shares outstanding (in shares)	60,411	59,790
Basic net loss per share (in dollars per share)	$ (0.16)	$ (0.66)
Diluted net loss per share (in dollars per share)	$ (0.16)	$ (0.66)