Consolidated Statement of Shareholders' Equity (unaudited) - 6 months ended Mar. 14, 2018 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Paid-In Capital	Retained Earnings
Balance (in shares) at Aug. 30, 2017		29,624	(500)
Balance at Aug. 30, 2017	$ 144,052	$ 9,480	$ (4,775)	$ 31,850	$ 107,497
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(16,087)				(16,087)
Share-based compensation expense (in shares)		57
Share-based compensation expense	1,252	$ 18		1,234
Common stock issued under employee benefit plans (in shares)		183
Common stock issued under employee benefit plans	0	$ 59		(59)
Common stock issued under nonemployee benefit plans (in shares)		87
Common stock issued under nonemployee benefit plans	0	$ 28		(28)
Balance (in shares) at Mar. 14, 2018		29,951	(500)
Balance at Mar. 14, 2018	$ 129,217	$ 9,585	$ (4,775)	$ 32,997	$ 91,410