Note 7 - Shareholders' Equity (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Jul. 28, 2012	Jul. 30, 2011	Jul. 31, 2010
Preferred stock shares authorized	10,000	10,000
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	$ 3,180	$ 3,007	$ 2,929
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	1,126	1,001	1,042
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6.7
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	4.8
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	5,161
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	3,385
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 5.78	$ 5.18
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	685	1,009	671
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	89	7,328	371
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	5,183
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1.6
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	1,353	727	486
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	280	385	287
Special Dividends		$ 14,005
Special Dividends Per Share Class A		$ 1.25
Special Dividends Per Share Class B		$ 0.8125

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