Fair Value Measurements (Based Upon Sensitivity and Nature of Inputs) (Details)	9 Months Ended
Sep. 30, 2013
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Dividend yield	0.00%
Probability of down-round triggering event	5.00%
Timing of down-round triggering event	December 2013
Minimum [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Volatility	51.91%
Risk free interest rate	0.16%
Expected term, in years	1 year 2 months 26 days
Maximum [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Volatility	57.04%
Risk free interest rate	0.98%
Expected term, in years	3 years 9 months 18 days

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueAssumptionsExpectedDividendRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_FairValueAssumptionsExpectedTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

+ Details

Name:	us-gaap_FairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

+ Details

Name:	us-gaap_FairValueAssumptionsRiskFreeInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FairValueInputsLiabilitiesQuantitativeInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair Value Assumptions Timing Of Down Round Triggering Event

+ References

No definition available.

+ Details

Name:	vrng_FairValueAssumptionsTimingOfDownRoundTriggeringEvent
Namespace Prefix:	vrng_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair Value Inputs, Probability of Achieving Target

+ References

No definition available.

+ Details

Name:	vrng_FairValueInputsProbabilityOfAchievingTarget
Namespace Prefix:	vrng_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration