Share-Based and Other Compensation - Narrative (Details)			7 Months Ended	12 Months Ended			163 Months Ended
	Aug. 12, 2020 USD ($) employee $ / shares shares	Aug. 30, 2017 shares	Mar. 18, 2020	Aug. 26, 2020 USD ($) plan $ / shares shares	Aug. 28, 2019 USD ($) $ / shares shares	Aug. 29, 2018 $ / shares shares	Aug. 29, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock plans | plan				2
Options canceled or expired (in shares)				366,911	178,700
Stock Options
Options to purchase shares (in shares)				860,501	1,387,412	1,653,414	1,653,414
Unrecognized compensation cost | $				$ 10,000
Weighted-average period for recognition of compensation cost				3 months 18 days
Cash received from options exercised | $				$ 0	$ 0
Cash and Restricted Share Bonus Plan [Abstract]
Period for recognition of compensation expense				3 months 18 days
401 (k) Plan [Abstract]
Company match of participant contributions			25.00%
Company matching percentage of salary			6.00%
Net expense | $				$ 200,000	300,000
Management
Cash and Restricted Share Bonus Plan [Abstract]
Number of employees | employee	5
Employee Severance
Severance Agreements [Abstract]
Number of positions eliminated | employee	8
Employee severance | $				1,000,000.0
Minimum | Employee Severance
Severance Agreements [Abstract]
Cash award granted, percentage	25.00%
Maximum | Employee Severance
Severance Agreements [Abstract]
Cash award granted, percentage	100.00%
Deferred Bonus
Cash and Restricted Share Bonus Plan [Abstract]
Cash bonus available to be earned | $	$ 200,000
Supplemental Executive Retirement Plan
Supplemental Executive Retirement Plan [Abstract]
Net benefit | $				0	0
Unfunded accrued liability | $				$ 24,000	$ 32,000
Restricted Stock Units
Restricted Stock Units and Restricted Stock Awards [Abstract]
Vesting period				3 years
Unrecognized compensation cost | $				$ 200,000
Weighted-average remaining contractual term				2 years	1 year 2 months 12 days	1 year 9 months 18 days
Performance Based Incentive Plan [Abstract]
Vesting period				3 years
Vested (in shares)				152,139	153,757
Shares outstanding (in shares)				173,808	274,009	517,291	517,291
Cash and Restricted Share Bonus Plan [Abstract]
Number of restricted stock available to be earned (in shares)				173,808	274,009	517,291	517,291
Weighted average share price on the grant date (in dollars per share) | $ / shares				$ 2.57	$ 3.39	$ 3.79	$ 3.79
Performance Based Incentive Plan
Restricted Stock Units and Restricted Stock Awards [Abstract]
Vesting period				3 years		3 years
Performance Based Incentive Plan [Abstract]
Expected volatility, minimum				0.00%
Expected volatility, maximum				200.00%
Vesting period				3 years		3 years
Vested (in shares)		187,883
Percentage of original target		50.00%				100.00%
Liability converted into equity | $				$ 496,000
Shares outstanding (in shares)				0	266,443	373,294	373,294
Cash and Restricted Share Bonus Plan [Abstract]
Number of restricted stock available to be earned (in shares)				0	266,443	373,294	373,294
Weighted average share price on the grant date (in dollars per share) | $ / shares				$ 0	$ 3.68	$ 3.68	$ 3.68
Restricted Stock
Stock Options
Weighted-average period for recognition of compensation cost	1 year
Performance Based Incentive Plan [Abstract]
Shares outstanding (in shares)	127,000
Cash and Restricted Share Bonus Plan [Abstract]
Number of restricted stock available to be earned (in shares)	127,000
Grant date fair value | $	$ 139,000
Weighted average share price on the grant date (in dollars per share) | $ / shares	$ 1.095
Period for recognition of compensation expense	1 year
Selling, general and administrative expense | Performance Based Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost (credit) for share-based payment arrangements | $				$ 100,000	$ 300,000
Performance Based Incentive Plan [Abstract]
Compensation cost (credit) for share-based payment arrangements | $				$ 100,000	$ 300,000
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
Shares issued (in shares)							2,200,000
Options canceled or expired (in shares)							100,000
Shares available fore future issuance (in shares)				49,000
Stock Options
Expiration period				10 years
Options granted (in shares)				0	0
Options to purchase shares (in shares)				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 | $				$ 800,000	$ 600,000
Performance Based Incentive Plan [Abstract]
Compensation cost (credit) for share-based payment arrangements | $				$ 800,000	$ 600,000
Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for issuance (in shares)				4,100,000
Shares issued (in shares)							7,400,000
Options canceled or expired (in shares)							5,200,000
Shares available fore future issuance (in shares)				1,800,000
Stock Options
Options granted (in shares)				0	0
Options to purchase shares (in shares)				860,501
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 | $				$ 300,000	$ 600,000
Performance Based Incentive Plan [Abstract]
Compensation cost (credit) for share-based payment arrangements | $				$ 300,000	$ 600,000
2016 TSR | Performance Based Incentive Plan
Performance Based Incentive Plan [Abstract]
Vested (in shares)					0
2016 TSR | Fair Value, Measurements, Recurring | Performance Based Incentive Plan
Performance Based Incentive Plan [Abstract]
Reduction in aggregate liability | $					$ 0
2017 TSR
Performance Based Incentive Plan [Abstract]
Vested (in shares)				0
2017 TSR | Fair Value, Measurements, Recurring | Performance Based Incentive Plan
Performance Based Incentive Plan [Abstract]
Reduction in aggregate liability | $				$ 0
Phantom Stock Plan
Phantom Stock Plan [Abstract]
Shares remaining unissued (in shares)				6,332