Leases - Supplemental Balance Sheet (Details) - USD ($)	Aug. 25, 2021	Aug. 26, 2020
Leases [Abstract]
Operating lease right-of-use assets	$ 0	$ 16,756,000
Operating lease liabilities - current		3,903,000
Operating lease liabilities - non-current	17,797,000	17,797,000
Total lease liabilities	$ 7,181,000	$ 21,700,000