3. Net Income (loss) Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 26, 2013	Oct. 27, 2012
Class A Common Stock
Net Income (Loss) Available to Common Stockholders, Basic	$ (5,064)	$ 3,932
Two Class Income Allocation Class B Conversion to Class A		1,776
Two Class Income Distribution Share Based Compensation		11
Net Income (Loss) Available to Common Stockholders, Diluted	(5,064)	5,719
Weighted Average Number of Shares Outstanding, Basic	9,136	7,549
Two Class Share Allocation Class B Conversion to Class A		5,913
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements		129
Weighted Average Number of Shares Outstanding, Diluted	9,136	13,591
Class B Common Stock
Net Income (Loss) Available to Common Stockholders, Basic	(1,601)	1,776
Two Class Income Distribution Share Based Compensation		(11)
Net Income (Loss) Available to Common Stockholders, Diluted	$ (1,601)	$ 1,765
Weighted Average Number of Shares Outstanding, Basic	4,413	5,913
Weighted Average Number of Shares Outstanding, Diluted	4,413	5,913