CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2013	Jul. 31, 2012
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	350,000	350,000
Common stock, shares issued	115,677	111,529
Common stock, shares outstanding	115,677	111,529