Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Oct. 31, 2011	Jul. 31, 2011
Accounts receivable:
Allowances for accounts receivables	$ 414	$ 414
STOCKHOLDERS' EQUITY
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	11,331,959	11,318,941
Common stock, shares outstanding	11,331,959	11,318,941