Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Aug. 26, 2020	Jun. 03, 2020	Mar. 11, 2020	Aug. 28, 2019	Jun. 05, 2019	Mar. 13, 2019	Dec. 18, 2019	Dec. 19, 2018	Aug. 26, 2020	Aug. 28, 2019
Disaggregation of Revenue [Line Items]
Total sales	$ 31,317	$ 18,994	$ 68,562	$ 71,363	$ 74,766	$ 74,424	$ 95,149	$ 102,917	$ 214,022	$ 323,470
Satisfied over time
Disaggregation of Revenue [Line Items]
Total sales									18,500	23,000
Satisfied at point in time
Disaggregation of Revenue [Line Items]
Total sales									$ 195,500	$ 300,500