Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jul. 31, 2012	Jul. 31, 2011
Accounts receivable, allowance for doubtful accounts	$ 344	$ 599
Common stock, par value	$ 0.05	$ 0.05
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	12,162,724	12,535,007
Common stock, shares outstanding	12,162,724	12,535,007