Note 1 - Summary of Significant Accounting Policies (Detail) - Allowances for doubtful accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 31, 2010
BALANCE AT BEGINNING OF YEAR	$ 31	$ 28	$ 74
CHARGED TO COSTS AND EXPENSE	6	48	(38)
DEDUCTIONS		45	8
BALANCE AT END OF YEAR	$ 37	$ 31	$ 28