XML 62 R26.htm IDEA: XBRL DOCUMENT v3.8.0.1

Common Shares (Tables)

12 Months Ended

Dec. 31, 2017

Capital Stock [Abstract]

Summary Of Warrant Activity

				Weighted			Weighted
				average			average
		Warrants		exercise price			remaining life
		outstanding		per share			(yrs.)		Intrinsic value
As of December 31, 2014		15,219,802		$	5.00		0.8		$	—
Expired (issued as part of equity financing completed in 2010)		(15,219,802)
As of December 31, 2015		—			—		—			—
Issued		6,514,625
As of December 31, 2016		6,514,625			1.92		2.6			—
As of December 31, 2017		6,514,625		$	1.92		1.6		$	—

Summary of Stock-based Compensation Expense

				Year Ended December 31,
			2017			2016			2015
Stock options			$	36		$	23		$	8
Restricted stock units				838			622			809
			$	874		$	645		$	817

Summary Of Option Activity

				Weighted average			Weighted average		Aggregate
		Number of		exercise price			remaining		intrinsic
		options		per option			contractual term		value
Outstanding - December 31, 2014		2,257,500		$	1.60		3.02		$	—
Outstanding - December 31, 2015		2,257,500			1.60		2.02			—
Granted		50,000			1.11					—
Exercised		(65,500)			0.39					42
Expired		(697,500)			2.91					—
Outstanding - December 31, 2016		1,544,500		$	1.05		1.79		$	626
Expired		(400,000)			2.87
Outstanding - December 31, 2017		1,144,500		$	0.42		1.15		$	346
Exercisable - December 31, 2017		898,250		$	0.43		1.19		$	262

Summary Of The Status Of Unvested Stock Options

							Weighted
				Weighted			average
				average			remaining
				grant-date			amortization
		Number of		fair value			period
		options		per option			(Years)
Unvested - December 31, 2014		246,250		$	0.22		3.99
Unvested - December 31, 2015		246,250			0.22		3.00
Granted		50,000			0.69
Unvested - December 31, 2016		296,250		$	0.49		1.23
Vested		(50,000)			0.69
Unvested - December 31, 2017		246,250		$	0.22		0.99

Schedule of Share Based Payments Valuation Assumptions

		2016
Expected volatility		77.68	%
Risk-free interest rate		1.12	%
Expected life (years)		5
Dividend yield		N/A
Forfeiture assumption		0	%

Summary Of Restricted Stock Units Activity

				Weighted average
		Number		grant-date fair
		of units		value per unit
Unvested - December 31, 2014		3,692,829		$	0.74
Cancelled/forfeited		(841,038)			0.73
Vested		(493,345)			1.62
Granted		1,727,000			0.27
Unvested - December 31, 2015		4,085,446		$	0.44
Vested		(2,475,046)			0.32
Granted		1,057,987			0.84
Unvested - December 31, 2016		2,668,387		$	0.49
Cancelled/forfeited		(441,084)			0.34
Vested, net of shares withheld		(1,625,399)			0.38
Granted		966,003			0.82
Unvested - December 31, 2017		1,567,907		$	0.85

Weighted Average Common Shares (Table)

		At December 31,
		2017		2016		2015
Basic common shares		98,627,255		89,064,260		82,571,182
Effect of dilutive stock-based awards		—		—		1,183,898
Diluted common shares		98,627,255		89,064,260		83,755,080

X

- References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ 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 (h)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

+ Details

Name:	us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the changes in outstanding nonvested shares.

+ 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)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ 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)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ 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 (f)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the change in restricted stock units (RSUs).

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Name:	us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the securities (Share based compensation) called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

+ References

No definition available.

+ Details

Name:	vgz_ScheduleOfWarrantsActivityUnderShareBasedCompensationPlanTableTextBlock
Namespace Prefix:	vgz_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration