CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares	Jan. 27, 2024	Jul. 29, 2023
Preferred stock shares authorized (in shares)	10,000,000	10,000,000
Preferred stock shares issued (in shares)	0	0
Common Class A
Common stock shares authorized (in shares)	20,000,000	20,000,000
Common stock shares issued (in shares)	11,556,000	11,563,000
Treasury shares (in shares)	968,000	912,000
Common Class B
Common stock shares authorized (in shares)	20,000,000	20,000,000
Common stock shares issued (in shares)	4,204,000	4,204,000
Common stock shares outstanding (in shares)	4,204,000	4,204,000