XML 87 R42.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Additional Paid-In Capital (Schedule Of Compensation Options) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012
Compensation option outstanding (in shares) |  | 225,000
Compensation options, Valuation |  | $ 294
Compensation options, Weighted average exercise price per share (in dollars per share) |  | $ 3.30
Compensation Options Expired | (294) |
Compensation options expired (in shares) | 120,000 |
Expiry date |  | Apr. 01, 2013
Compensation options, Weighted average remaining life (yrs.) |  | 3 months 18 days
Compensation Options [Member] |  |
Compensation Options Expired | (294) |
Compensation options expired (in shares) | (225,000) |
Other Paid-In Capital [Member] |  |
Compensation Options Expired | $ 294 |

X
- Definition Date the equity-based award expires, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(g) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Adjustments to additional paid in capital, compensation options expired. + References No definition available. + Details
Name: | vgz_CompensationOptionsExpired
Namespace Prefix: | vgz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Share-based compensation arrangement by share based payment award compensation options outstanding weighted average exercise price. + References No definition available. + Details
Name: | vgz_ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix: | vgz_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award compensation options outstanding weighted average Remaining life. + References No definition available. + Details
Name: | vgz_ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationOptionsOutstandingWeightedAverageRemainingLife
Namespace Prefix: | vgz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares granted and reserved for issuance under stock option agreements awarded under the plan that validly exist as of the balance sheet date, including vested options. + References No definition available. + Details
Name: | vgz_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedNumber
Namespace Prefix: | vgz_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value of options outstanding. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. + References No definition available. + Details
Name: | vgz_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingFairValue
Namespace Prefix: | vgz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant