CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares	Jul. 25, 2015	Jul. 26, 2014
Preferred stock shares authorized (in shares)	10,000,000	10,000,000
Preferred stock shares issued (in shares)	0	0
Class A Common Stock
Common stock shares authorized (in shares)	20,000,000	20,000,000
Common stock shares issued (in shares)	10,192,000	10,147,000
Treasury stock shares (in shares)	343,000	454,000
Class B Common Stock
Common stock shares authorized (in shares)	20,000,000	20,000,000
Common stock shares issued (in shares)	4,319,000	4,361,000
Common Stock, Shares, Outstanding	4,319,000	4,361,000