Note 4 - Inventories (Detail) - Inventories (USD $) In Thousands, unless otherwise specified	Jul. 28, 2012	Jul. 30, 2011	Jul. 31, 2010	Aug. 01, 2009
Raw materials and purchased parts	$ 1,957	$ 2,214
Work-in-process	587	457
Finished goods	232	212
	2,776	2,883
Less: allowance for excess and obsolete inventories	(1,056)	(1,175)	(697)	(900)
Total inventories net	$ 1,720	$ 1,708