Note 15 - Supplemental Quarterly Financial Information (Unaudited) (Detail) - Supplemental Quarterly Financial Information (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 31, 2010
Net sales	$ 11,438	$ 10,783	$ 12,473
Gross margin	3,612	2,913	4,363
Income (loss) from continuing operations	(2,951)	(1,694)	532
Net income (loss)	5,116	1,130	(812)
Net income (loss) per basic share (in Dollars per share)	$ 1.33	$ 0.37	$ (0.45)
Net income (loss) per diluted share (in Dollars per share)	$ 1.33	$ 0.37	$ (0.45)
Q1 [Member]
Net sales	2,602	2,247
Gross margin	888	542
Income (loss) from continuing operations	(429)	(645)
Net income (loss)	200	273
Net income (loss) per basic share (in Dollars per share)	$ 0.05	$ 0.15
Net income (loss) per diluted share (in Dollars per share)	$ 0.05	$ 0.15
Q2 [Member]
Net sales	2,926	2,488
Gross margin	992	276
Income (loss) from continuing operations	(243)	(674)
Net income (loss)	7,195	1,130
Net income (loss) per basic share (in Dollars per share)	$ 1.87	$ 0.43
Net income (loss) per diluted share (in Dollars per share)	$ 1.87	$ 0.43
Q3 [Member]
Net sales	3,050	2,732
Gross margin	942	825
Income (loss) from continuing operations	(439)	(206)
Net income (loss)	(439)	(350)
Net income (loss) per basic share (in Dollars per share)	$ (0.11)	$ (0.09)
Net income (loss) per diluted share (in Dollars per share)	$ (0.11)	$ (0.09)
Q4 [Member]
Net sales	2,860	3,316
Gross margin	790	1,270
Income (loss) from continuing operations	(1,840)	(360)
Net income (loss)	$ (1,840)	$ 77
Net income (loss) per basic share (in Dollars per share)	$ (0.48)	$ 0.02
Net income (loss) per diluted share (in Dollars per share)	$ (0.48)	$ 0.02