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Note 11 - Shareholders' Equity (Detail) - Stock Options Valuation Assumptions (USD $)
12 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 31, 2010
Estimated life (in years) 7 years   7 years
Volatility rate 62.6 - 62.8 - 65%-69%
Risk free interest rate 1.31%-1.36% - 2.77%-3.49%
Dividend rate     0.00%
Forfeiture rate 2.00%   2.00%
Weighted average fair value (in Dollars per share) $ 6.11   $ 5.36