Share-Based Compensation (Details)		12 Months Ended			24 Months Ended	163 Months Ended
	Aug. 30, 2017 USD ($) shares	Aug. 29, 2018 USD ($) plan $ / shares shares	Aug. 30, 2017 USD ($) $ / shares shares	Aug. 31, 2016 USD ($) $ / shares shares	Aug. 29, 2018 USD ($) plan shares	Aug. 29, 2018 USD ($) plan shares	Aug. 26, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock plans | plan		2			2	2
Options canceled or expired (in shares)		97,111	55,893	55,893
Stock options canceled (in shares)			9,290
Stock Options
Options granted (in shares)		449,410	295,869	279,944
Options to purchase shares (in shares)	1,345,916	1,653,414	1,345,916	1,169,238	1,653,414	1,653,414	1,288,099
Unrecognized compensation cost | $		$ 300,000			$ 300,000	$ 300,000
Weighted-average period for recognition of compensation cost		1 year 8 months 9 days
Weighted-average grant-date fair value (in dollars per share) | $ / shares		$ 1.05	$ 1.66	$ 1.92
Cash received from options exercised | $		$ 0	$ 0	$ 82,000
Restricted Stock Units and Restricted Stock Awards [Abstract]
Weighted-average period for recognition of compensation cost		1 year 8 months 9 days
Performance Based Incentive Plan [Abstract]
Weighted-average period for recognition of compensation cost		1 year 8 months 9 days
Phantom Stock Plan [Abstract]
Authorized shares (in shares)	100,000,000	100,000,000	100,000,000		100,000,000	100,000,000
401 (k) Plan [Abstract]
Company match of participant contributions		25.00%
Company matching percentage of salary		6.00%
Net expense | $		$ 243,000	$ 359,000	350,000
Supplemental Executive Retirement Plan
Supplemental Executive Retirement Plan [Abstract]
Net benefit | $		0	0	$ 0
Unfunded accrued liability | $	$ 45,000	39,000	$ 45,000		$ 39,000	$ 39,000
Performance Shares
Performance Based Incentive Plan [Abstract]
Liability converted into equity | $		$ 496,000
Restricted Stock Units
Stock Options
Weighted-average period for recognition of compensation cost		1 year 9 months 26 days
Restricted Stock Units and Restricted Stock Awards [Abstract]
Vesting period		3 years
Unrecognized compensation cost | $		$ 800,000			$ 800,000	$ 800,000
Weighted-average period for recognition of compensation cost		1 year 9 months 26 days
Performance Based Incentive Plan [Abstract]
Vesting period		3 years
Vested (in shares)		99,495	92,058	257,482
Shares outstanding (in shares)	404,364	517,291	404,364	314,833	517,291	517,291	409,417
Weighted-average period for recognition of compensation cost		1 year 9 months 26 days
Performance Based Incentive Plan
Stock Options
Weighted-average period for recognition of compensation cost		1 year 11 months 27 days
Restricted Stock Units and Restricted Stock Awards [Abstract]
Vesting period		3 years
Weighted-average period for recognition of compensation cost		1 year 11 months 27 days
Performance Based Incentive Plan [Abstract]
Expected volatility, minimum		0.00%
Expected volatility, maximum		200.00%
Vesting period		3 years
Vested (in shares)	187,883	187,883
Percentage of original target	50.00%	100.00%
Shares outstanding (in shares)	0	373,294	0		373,294	373,294
Unrecognized compensation cost | $		$ 1,100,000			$ 1,100,000	$ 1,100,000
Weighted-average period for recognition of compensation cost		1 year 11 months 27 days
Fair Value, Measurements, Recurring | Performance Based Incentive Plan
Performance Based Incentive Plan [Abstract]
Reduction in aggregate liability | $					$ 300,000
Selling, general and administrative expense | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost (credit) for share-based payment arrangements | $		$ (15,000)	$ 38,000	$ 684,000
Performance Based Incentive Plan [Abstract]
Compensation cost (credit) for share-based payment arrangements | $		$ (15,000)	$ 38,000	$ 684,000
Non Employee Directors Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for issuance (in shares)		2,100,000.0			2,100,000.0	2,100,000.0
Shares issued (in shares)						1,300,000
Options canceled or expired (in shares)						100,000
Shares available fore future issuance (in shares)		900,000			900,000	900,000
Stock Options
Expiration period		10 years
Options granted (in shares)		0	0	0
Options to purchase shares (in shares)		0			0	0
Restricted Stock Units and Restricted Stock Awards [Abstract]
Restricted stock award premium		20.00%
Non Employee Directors Stock Plan | First Anniversary
Stock Options
Vesting percentage		100.00%
Non Employee Directors Stock Plan | Selling, general and administrative expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost (credit) for share-based payment arrangements | $		$ 500,000	$ 700,000	$ 700,000
Performance Based Incentive Plan [Abstract]
Compensation cost (credit) for share-based payment arrangements | $		$ 500,000	700,000	$ 700,000
Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for issuance (in shares)		4,100,000			4,100,000	4,100,000
Shares issued (in shares)						7,200,000
Options canceled or expired (in shares)						3,800,000
Shares available fore future issuance (in shares)		700,000			700,000	700,000
Stock options canceled (in shares)				312,663
Stock Options
Options to purchase shares (in shares)		1,653,414			1,653,414	1,653,414
Option price, minimum (in dollars per share) | $ / shares		$ 2.82
Option price, maximum (in dollars per share) | $ / shares		$ 5.95
Employee Stock Plan | First Anniversary
Stock Options
Vesting percentage		50.00%
Employee Stock Plan | Second Anniversary
Stock Options
Vesting percentage		25.00%
Employee Stock Plan | Third Anniversary
Stock Options
Vesting percentage		25.00%
Expiration period		10 years
Employee Stock Plan | Selling, general and administrative expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost (credit) for share-based payment arrangements | $		$ 900,000	900,000	$ 1,000,000
Performance Based Incentive Plan [Abstract]
Compensation cost (credit) for share-based payment arrangements | $		900,000	$ 900,000	1,000,000
Employee Stock Plan | Selling, general and administrative expense | Accelerated Share-based Compensation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost (credit) for share-based payment arrangements | $				252,000
Performance Based Incentive Plan [Abstract]
Compensation cost (credit) for share-based payment arrangements | $				$ 252,000
2016 TSR | Fair Value, Measurements, Recurring | Performance Shares
Performance Based Incentive Plan [Abstract]
Reduction in aggregate liability | $		$ 0
Phantom Stock Plan
Phantom Stock Plan [Abstract]
Authorized shares (in shares)		100,000			100,000	100,000
Shares remaining unissued (in shares)		17,801			17,801	17,801