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Fair Value of Financial Instruments - Additional Information (Detail) (USD $)
12 Months Ended
Nov. 02, 2014
Nov. 03, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Transfers between levels $ 0visi_FairValueTransfersBetweenDifferentLevel $ 0visi_FairValueTransfersBetweenDifferentLevel
Short-Term Investments [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities $ 100,000us-gaap_AvailableForSaleSecurities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_ShortTermInvestmentsMember
$ 100,000us-gaap_AvailableForSaleSecurities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_ShortTermInvestmentsMember