CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (USD $) In Thousands, except Share data, unless otherwise specified		Total		Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]
Beginning balance at Jul. 31, 2008 (As Previously Reported [Member])		$ 545,974		$ 491	$ (35,268)	$ 7,471,230	$ 19,297	$ (6,909,776)
Beginning balance at Jul. 31, 2008	[1]	514,772		491	(35,268)	7,471,230	19,297	(6,940,978)
Beginning balance, shares at Jul. 31, 2008 (As Previously Reported [Member])				49,061,660
Beginning balance, shares at Jul. 31, 2008	[1]			49,061,660
Correction of prior errors (Restatement Pricing Adjustment [Member])		(31,202)						(31,202)
Comprehensive loss, net of taxes:
Net loss	[1]	(199,383)						(199,383)
Net loss at Aug. 01, 2008 (As Previously Reported [Member])		(193,452)
Net loss (Restatement Pricing Adjustment [Member])		(6,574)
Other comprehensive loss:
Net unrealized holding gain		(1,207)					(1,207)
Pension adjustments		414					414
Foreign currency translation adjustment		(4,199)					(4,199)
Total comprehensive loss		(204,375)
Issuance of common stock pursuant to employee stock purchase plans and stock option exercises		175				175
Issuance of common stock pursuant to employee stock purchase plans and stock option exercises, shares				37,593
Restricted stock grants		2,149		1		2,148
Restricted stock grants, shares				96,268
Restricted stock forfeitures		(335)		(1)		(334)
Restricted stock forfeitures, shares				(81,738)
Share-based compensation expense		2,891				2,891
Repurchase of common stock		(6,812)			(6,812)
Repurchase of common stock, shares				1,043,183
Retirement of treasury stock				(34)	38,267	(38,233)
Retirement of treasury stock, shares				(3,461,705)
Ending balance at Jul. 31, 2009	[1]	308,465		457	(3,813)	7,437,877	14,305	(7,140,361)
Ending balance, shares at Jul. 31, 2009	[1]			45,652,078
Comprehensive loss, net of taxes:
Net loss	[1]	(23,841)						(23,841)
Net loss at Aug. 01, 2009 (As Previously Reported [Member])		(17,787)
Net loss (Restatement Pricing Adjustment [Member])		(4,891)
Other comprehensive loss:
Net unrealized holding gain		98					98
Pension adjustments		(255)					(255)
Foreign currency translation adjustment		89					89
Total comprehensive loss		(23,909)
Issuance of common stock pursuant to employee stock purchase plans and stock option exercises		412		1		411
Issuance of common stock pursuant to employee stock purchase plans and stock option exercises, shares				53,444
Restricted stock grants		1,717		2		1,715
Restricted stock grants, shares				165,438
Restricted stock forfeitures		(10)		(2)		(8)
Restricted stock forfeitures, shares				(25,917)
Share-based compensation expense		2,018				2,018
Repurchase of common stock		(13,179)			(13,179)
Repurchase of common stock, shares				1,550,373
Retirement of treasury stock				(18)	15,000	(14,982)
Retirement of treasury stock, shares				(1,805,105)
Ending balance at Jul. 31, 2010	[1]	275,514		440	(1,992)	7,427,031	14,237	(7,164,202)
Ending balance, shares at Jul. 31, 2010 (As Previously Reported [Member])		44,039,938
Ending balance, shares (Restatement Pricing Adjustment [Member])		44,039,938
Ending balance, shares at Jul. 31, 2010	[1]	44,039,938		44,039,938
Comprehensive loss, net of taxes:
Net loss		(34,465)	[1]					(34,465)
Net loss at Aug. 01, 2010 (As Previously Reported [Member])		(49,015)
Net loss (Restatement Pricing Adjustment [Member])		11,576
Other comprehensive loss:
Net unrealized holding gain		(73)					(73)
Pension adjustments		128					128
Foreign currency translation adjustment		11,344					11,344
Total comprehensive loss		(23,066)
Issuance of common stock pursuant to employee stock purchase plans and stock option exercises		208		1		207
Issuance of common stock pursuant to employee stock purchase plans and stock option exercises, shares				42,807
Restricted stock grants				3		(3)
Restricted stock grants, shares				334,533
Restricted stock forfeitures, shares				(23,003)
Share-based compensation expense		3,481				3,481
Repurchase of common stock		(1,394)			(1,394)
Repurchase of common stock, shares				215,514
Retirement of treasury stock		(246)		(6)	3,386	(3,626)
Retirement of treasury stock, shares				(565,178)
Special dividend payment		(39,955)				(39,955)
Ending balance at Jul. 31, 2011	[1]	214,542		438		7,387,135	25,636	(7,198,667)
Ending balance, shares at Jul. 31, 2011 (As Previously Reported [Member])		43,829,097
Ending balance, shares (Restatement Pricing Adjustment [Member])		43,829,097
Ending balance, shares at Jul. 31, 2011	[1]	43,829,097		43,829,097
Comprehensive loss, net of taxes:
Net loss		(38,108)						(38,108)
Other comprehensive loss:
Pension adjustments		(3,545)					(3,545)
Foreign currency translation adjustment		(10,650)					(10,650)
Total comprehensive loss		(52,303)
Issuance of common stock pursuant to employee stock purchase plans and stock option exercises		114				114
Issuance of common stock pursuant to employee stock purchase plans and stock option exercises, shares				45,977
Restricted stock grants				2		(2)
Restricted stock grants, shares				217,359
Restricted stock forfeitures		(188)		(1)		(187)
Restricted stock forfeitures, shares				(165,811)
Share-based compensation expense		2,967				2,967
Ending balance at Jul. 31, 2012		$ 165,132		$ 439		$ 7,390,027	$ 11,441	$ (7,236,775)
Ending balance, shares at Jul. 31, 2012		43,926,622		43,926,622

[1] As Restated