Nature of Operations and Significant Accounting Policies - Narrative (Details) $ / shares in Units, $ in Thousands						9 Months Ended
	May 31, 2022 USD ($) $ / shares shares	May 24, 2022 USD ($) $ / shares	Mar. 28, 2022 USD ($) $ / shares	Nov. 01, 2021 USD ($) $ / shares	Aug. 26, 2021 USD ($) restaurant	May 31, 2022 USD ($) restaurant $ / shares	May 27, 2022 $ / shares
Nature of Operations and Significant Accounting Policies (Details) [Line Items]
Distribution | $		$ 6,200	$ 15,500	$ 62,200
Distribution (in dollars per share) | $ / shares		$ 0.20	$ 0.50	$ 2.00
Common stock, par value (in dollars per share) | $ / shares	$ 1.96					$ 1.96	$ 0.32
Treasury stock cancelled (in shares) | shares	500,000
Entity termination period						3 years
Luby's cafeterias | Disposal Group, Disposed of by Sale
Nature of Operations and Significant Accounting Policies (Details) [Line Items]
Number of restaurants sold | restaurant					35	39
Consideration | $	$ 118,700				$ 28,400	$ 118,700