Special Charges (Details) (USD $)	3 Months Ended		6 Months Ended	12 Months Ended		3 Months Ended		12 Months Ended				36 Months Ended
	Feb. 04, 2012	Jan. 31, 2009	May 05, 2012	Oct. 29, 2011	Nov. 01, 2008	May 05, 2012 Reduction of Operating Costs [Member] Person	Feb. 04, 2012 Reduction of Operating Costs [Member] Person	Oct. 29, 2011 Reduction of Operating Costs [Member] Person	Oct. 30, 2010 Reduction of Operating Costs [Member]	Oct. 31, 2009 Reduction of Operating Costs [Member]	Nov. 01, 2008 Reduction of Operating Costs [Member] Person	Oct. 30, 2010 Reduction of Operating Costs [Member]
Summary of the Company's special charges, Income Statement
Workforce reductions						$ 2,535,000		$ 2,239,000	$ 10,908,000	$ 26,583,000	$ 1,627,000
Facility closure costs										2,411,000
Non-cash impairment charge									487,000	839,000
Other items						60,000			24,000	500,000
Total Charges	2,600,000		2,595,000			2,595,000		2,239,000	11,419,000	30,333,000	1,627,000	43,300,000
Summary of the Company's special charges and accruals related to ongoing actions, Balance Sheet
Accrued Restructuring, Beginning Balance						5,112,000	3,876,000
Fiscal 2012 special charge							2,595,000
Severance payments						(2,760,000)	(1,359,000)
Accrued Restructuring, Ending Balance						2,352,000	5,112,000	3,876,000
Special Charges (Textual) [Abstract]
Charge related to lease obligation costs for facilities ceased using by Company		2,100,000										2,100,000
Write-off of property, plant and equipment no longer used											800,000	800,000
Contract termination costs	100,000				500,000							500,000
Clean-up and closure costs that were expensed as incurred											300,000	300,000
Number of manufacturing employees											245
Special charges	2,600,000		2,595,000			2,595,000		2,239,000	11,419,000	30,333,000	1,627,000	43,300,000
Charge related to the severance and fringe benefit costs	2,500,000			2,200,000							39,100,000	39,100,000
Impairment of intellectual property, related to the Company's decision to abandon efforts to develop a particular expertise in power management											$ 500,000	$ 500,000
Number of engineering and selling, marketing, general and administrative (SMGA) employees							34	25			470
Employees planned to be separated who are still employed						3