CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - shares	Jan. 23, 2016	Jul. 25, 2015
Preferred stock shares authorized (in shares)	10,000,000	10,000,000
Preferred stock shares issued (in shares)	0	0
Common Class A [Member]
Common stock shares authorized (in shares)	20,000,000	20,000,000
Common stock shares issued (in shares)	10,190,000	10,192,000
Treasury shares	361,000	343,000
Common Class B [Member]
Common stock shares authorized (in shares)	20,000,000	20,000,000
Common stock shares issued (in shares)	4,319,000	4,319,256