CONSOLIDATED BALANCE SHEETS [Parenthetical] (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 30, 2012	Jul. 31, 2011
Allowance for doubtful accounts (in dollars)	$ 1,237	$ 9,329
Inventory valuation reserve (in dollars)	$ 75,213	$ 37,814
Common stock, par value (in dollars per share)	$ 0.008	$ 0.008
Common stock, shares authorized	125,000,000	125,000,000
Common stock, shares issued	9,790,760	6,572,181
Common stock, shares outstanding	9,790,760	6,572,181
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	9,400,000	9,400,000
Preferred stock, shares issued	7,050,000	9,400,000
Preferred stock, shares outstanding	7,050,000	9,400,000
Series B Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.008	$ 0.008
Preferred stock, shares authorized	325,000	325,000
Preferred stock, shares issued	262,500	325,000
Preferred stock, shares outstanding	262,500	325,000