Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jul. 28, 2012	Jul. 30, 2011
Trade receivables, allowance for doubtful accounts (in Dollars)	$ 37	$ 31
Inventories, allowance for excess and obsolete (in Dollars)	$ 1,056	$ 1,175
Common stock, par value (in Dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	4,042,157	4,042,157
Treasury shares, shares	202,689	174,585