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Discontinued Operations (Additional Information) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Feb. 18, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Cost Method Investment Ownership Percentage     8.25%vrng_CostMethodInvestmentOwnershipPercentage
Infomedia [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Cost Method Investment Ownership Percentage     8.25%vrng_CostMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= vrng_InfomediaMember
Cost Method Investments $ 787us-gaap_CostMethodInvestments
/ dei_LegalEntityAxis
= vrng_InfomediaMember		 $ 787us-gaap_CostMethodInvestments
/ dei_LegalEntityAxis
= vrng_InfomediaMember