Combined and Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jul. 31, 2013	Jul. 31, 2012
Net of allowance for doubtful accounts	$ 4	$ 11
Preferred stock, Par value	$ 0.01	$ 0.01
Preferred stock, Shares authorized	3,000	3,000
Preferred stock, Shares issued
Class A common stock
Common stock, Par value	$ 0.01	$ 0.01
Common stock, Shares authorized	2,000	2,000
Common stock, Shares issued	787
Common stock, Shares outstanding	787
Class B common stock
Common stock, Par value	$ 0.01	$ 0.01
Common stock, Shares authorized	40,000	40,000
Common stock, Shares issued	10,693
Common stock, Shares outstanding	10,693