Diluted Earnings Per Share - Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Nov. 29, 2020	Aug. 30, 2020	Nov. 24, 2019	Aug. 25, 2019	Nov. 29, 2020	Nov. 24, 2019
Numerator:
Consolidated net loss	$ (13,301)	$ (11,000)	$ (6,740)	$ (4,784)	$ (24,301)	$ (11,524)
Denominator:
Weighted average shares for basic net loss per share (in shares)	29,280		29,155		29,261	29,147
Effect of dilutive securities:
Stock options and restricted stock units (in shares)	0		0		0	0
Weighted average shares for diluted net loss per share (in shares)	29,280		29,155		29,261	29,147
Diluted net loss per share (in dollars per share)	$ (0.45)		$ (0.23)		$ (0.83)	$ (0.40)