CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 30, 2014	Jul. 31, 2013
Trade accounts receivable, allowance	$ 158	$ 285
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.005	$ 0.005
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	3,030,697	3,016,758
Treasury stock, shares	139,084	139,084
Redeemable Convertible Preferred Stock [Member]
Preferred stock, par value	$ 0.005	$ 0.005
Preferred stock, shares authorized	2,750	0
Preferred stock, shares issued	2,750	0
Preferred stock, shares outstanding	2,750	0