3. Net Income (loss) Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 25, 2014	Jan. 26, 2013	Jan. 25, 2014	Jan. 26, 2013
Class A Common Stock
Net Income (Loss) Available to Common Stockholders, Basic	$ 2,102	$ 6,373	$ (2,979)	$ 10,463
Two Class Income Allocation Class B Conversion to Class A	648	2,503		4,123
Two Class Income Distribution Share Based Compensation	(1)
Net Income (Loss) Available to Common Stockholders, Diluted	2,749	8,876	(2,979)	14,586
Weighted Average Number of Shares Outstanding, Basic	9,198	8,396	9,167	7,972
Two Class Share Allocation Class B Conversion to Class A	4,361	5,086		5,500
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	85	108		118
Weighted Average Number of Shares Outstanding, Diluted	13,644	13,590	9,167	13,590
Class B Common Stock
Net Income (Loss) Available to Common Stockholders, Basic	648	2,503	(937)	4,123
Net Income (Loss) Available to Common Stockholders, Diluted	$ 648	$ 2,503	$ (937)	$ 4,123
Weighted Average Number of Shares Outstanding, Basic	4,361	5,086	4,387	5,500
Weighted Average Number of Shares Outstanding, Diluted	4,361	5,086	4,387	5,500