Discontinued Operations (Details) - USD ($) $ in Thousands			3 Months Ended								12 Months Ended
	Oct. 27, 2017	Dec. 01, 2014	Oct. 29, 2017	Jul. 30, 2017	Apr. 30, 2017	Jan. 29, 2017	Oct. 30, 2016	Jul. 31, 2016	May 01, 2016	Jan. 31, 2016	Oct. 29, 2017	Oct. 30, 2016	Nov. 01, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring and severance costs			$ 307	$ 249	$ 199	$ 624	$ 1,181	$ 970	$ 840	$ 2,761	$ 1,379	$ 5,752	$ 3,635
Settlement and impairment charges			1,404	$ 0	$ 290	$ 0	364	$ 0	$ 0	$ 0	1,694	364	6,626
Severance
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring and severance costs											1,301	5,373
Discontinued Operations, Disposed of by Sale | Computer Systems Segment | NewNet Communication Technologies, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Note receivable	$ 1,000	$ 10,000
Interest rate		0.50%
Payment term		4 years
Capital interest percentage		20.00%
Payment to acquire note receivable		$ 4,000
Payment term		45 days
Working capital adjustment	1,500	$ 6,000	$ 1,700								1,700
Loss on disposal													1,500
Restructuring and severance costs													2,200
Unamortized discount							$ 1,100					$ 1,100
Gross receivable amount	7,500
Agreed upon cash receipt	6,500
Proceeds from collection of notes receivable	5,000
Receivable amount, net of working capital adjustment	$ 6,000
Settlement and impairment charges											$ 1,400
Discontinued Operations, Disposed of by Sale | Computer Systems Segment | NewNet Communication Technologies, LLC | Severance
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring and severance costs													900
Discontinued Operations, Disposed of by Sale | Computer Systems Segment | NewNet Communication Technologies, LLC | Professional Fees
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring and severance costs													900
Discontinued Operations, Disposed of by Sale | Computer Systems Segment | NewNet Communication Technologies, LLC | Lease Obligation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring and severance costs													$ 400
Discontinued Operations, Disposed of by Sale | Computer Systems Segment | NewNet Communication Technologies, LLC | Notes Receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loan receivable fair value		$ 8,400