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.