3. Net Income (loss) Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 26, 2014	Apr. 27, 2013	Apr. 26, 2014	Apr. 27, 2013
Class A Common Stock
Net Income (Loss) Available to Common Stockholders, Basic	$ 2,395	$ 3,245	$ (595)	$ 13,698
Two Class Income Allocation Class B Conversion to Class A	720	1,262		5,394
Two Class Income Distribution Share Based Compensation		5
Net Income (Loss) Available to Common Stockholders, Diluted	3,115	4,512	(595)	19,092
Weighted Average Number of Shares Outstanding, Basic	9,288	8,492	9,207	8,146
Two Class Share Allocation Class B Conversion to Class A	4,361	5,007		5,336
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	30	96		110
Weighted Average Number of Shares Outstanding, Diluted	13,679	13,595	9,207	13,592
Class B Common Stock
Net Income (Loss) Available to Common Stockholders, Basic	720	1,262	(205)	5,394
Two Class Income Distribution Share Based Compensation		(3)
Net Income (Loss) Available to Common Stockholders, Diluted	$ 720	$ 1,259	$ (205)	$ 5,394
Weighted Average Number of Shares Outstanding, Basic	4,361	5,007	4,378	5,336
Weighted Average Number of Shares Outstanding, Diluted	4,361	5,007	4,378	5,336