CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares	Apr. 29, 2023	Jul. 30, 2022
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)	11,478,000	10,971,000
Treasury shares (in shares)	914,000	752,000
Common Class B
Common stock shares authorized (in shares)	20,000,000	20,000,000
Common stock shares issued (in shares)	4,294,000	4,294,000
Common stock shares outstanding (in shares)	4,294,000	4,294,000