EQUITY PLANS (Details 3) - Stock options - USD ($)	12 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Aug. 01, 2015
Number of Options
Outstanding at beginning of year (in shares)	343,629
Exercised (in shares)	(8,510)
Forfeited (in shares)	2,572
Cancelled (in shares)	3,858
Outstanding at end of year (in shares)	328,689	343,629
Exercisable at end of year (in shares)	265,847
Weighted Average Exercise Price
Outstanding at beginning of year (in dollars per share)	$ 49.13
Exercised (in dollars per share)	32.20
Forfeited (in dollars per share)	64.55
Cancelled (in dollars per share)	42.82
Outstanding at end of year (in dollars per share)	49.52	$ 49.13
Exercisable at end of year (in dollars per share)	$ 47.05
Weighted Average Remaining Contractual Term
Outstanding at end of year	4 years 11 months 19 days
Exercisable at end of year	4 years 4 months 28 days
Aggregate Intrinsic Value
Outstanding at end of year	$ 868,658
Exercisable at end of year	$ 868,658
Weighted average grant-date fair value of options granted (in dollars per share)	$ 0.00	$ 15.59	$ 14.82
Aggregate intrinsic value of options exercised	$ 100,000	$ 2,600,000	$ 3,100,000