CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands	Total USD ($)	Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Accumulated Deficit [Member] USD ($)	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)
Beginning Balance at Jul. 31, 2009	$ 940,425	$ 28	$ 2,040,317	$ (1,101,355)		$ 1,435
Beginning Balance, shares at Jul. 31, 2009		28,424
Net loss.	(14,805)			(14,805)
Unrealized gain (loss) on investments and other	(820)					(820)
Total comprehensive loss	(15,625)
Issuance of common stock under employee and director stock plans	233		233
Issuance of common stock under employee and director stock plans, shares		13
Cash distribution	(284,320)		(284,320)
Treasury stock purchases					6
Treasury stock retirement		(6)			(6)
Share-based compensation expense	3,290		3,290
Ending Balance at Jul. 31, 2010	644,003	28	1,759,520	(1,116,160)		615
Ending Balance, shares at Jul. 31, 2010		28,431
Net loss.	(17,798)			(17,798)
Unrealized gain (loss) on investments and other	(1,053)					(1,053)
Total comprehensive loss	(18,851)
Issuance of common stock under employee and director stock plans	6,300	1	6,299
Issuance of common stock under employee and director stock plans, shares		308
Cash distribution	(185,446)		(185,446)
Share-based compensation expense	2,751		2,751
Ending Balance at Jul. 31, 2011	448,757	29	1,583,124	(1,133,958)		(438)
Ending Balance, shares at Jul. 31, 2011		28,739
Net loss.	(12,924)			(12,924)
Unrealized gain (loss) on investments and other	165					165
Total comprehensive loss	(12,759)
Issuance of common stock under employee and director stock plans	2,444		2,444
Issuance of common stock under employee and director stock plans, shares		140
Share-based compensation expense	3,789		3,789
Ending Balance at Jul. 31, 2012	$ 442,231	$ 29	$ 1,589,357	$ (1,146,882)		$ (273)
Ending Balance, shares at Jul. 31, 2012		28,879