Note 1 - Summary of Significant Accounting Policies - Weighted-average Common and Dilutive Potential Common Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 06, 2017		Feb. 28, 2017		Nov. 29, 2016		Aug. 30, 2016		May 31, 2016		Mar. 01, 2016		Dec. 01, 2015		Sep. 01, 2015		Jun. 06, 2017		May 31, 2016		Jun. 02, 2015
Net loss	$ (8,687)		$ (19,805)		$ (37,956)		$ (39,692)		$ (27,603)		$ (3,086)		$ (15,799)		$ (4,194)		$ (106,140)		$ (50,682)		$ (3,194)
Weighted average common shares outstanding (in shares)																	60,139		60,871		60,580
Weighted average common and dilutive potential common shares outstanding (in shares)																	60,139		60,871		60,580
Basic loss per share (in dollars per share)	$ (0.14)	[1]	$ (0.33)	[1]	$ (0.63)	[1]	$ (0.66)	[1]	$ (0.46)	[1]	$ (0.05)	[1]	$ (0.26)	[1]	$ (0.07)	[1]	$ (1.76)	[1]	$ (0.83)	[1]	$ (0.05)
Diluted loss per share (in dollars per share)	$ (0.14)	[1]	$ (0.33)	[1]	$ (0.63)	[1]	$ (0.66)	[1]	$ (0.46)	[1]	$ (0.05)	[1]	$ (0.26)	[1]	$ (0.07)	[1]	$ (1.76)	[1]	$ (0.83)	[1]	$ (0.05)

[1] The sum of the quarterly loss per share does not equal the reported annual amount as each is computed independently based upon the weighted average number of shares outstanding for the period.