Vista Gold (VGZ) 10-K 3 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 16, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	VISTA GOLD CORP
Entity Central Index Key	783324
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Entity Common Stock, Shares Outstanding		82,390,217
Entity Public Float			$40,903,609
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Trading Symbol	vgz

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$3,714	$5,475
Marketable securities	137	176
Other investments (Note 4)	6,163
Deferred Tax Assets, Net of Valuation Allowance, Current		2,353
Other current assets	1,348	1,840
Total current assets	11,362	9,844
Non-current assets:
Mineral properties (Note 5)	5,406	7,184
Plant and equipment (Note 6)	2,842	3,698
Equipment held for sale (Note 6)	6,500	6,500
Amayapampa interest (Note 7)	20,990	4,813
Long-term investments		21,055
Long-term deferred tax asset (Note 4)	1,916
Total non-current assets	16,664	43,250
Total assets	28,026	53,094
Current liabilities:
Accounts payable	457	705
Accrued liabilities and other	370	517
Current deferred tax liability	1,916
Total current liabilities	2,743	1,222
Non-current liabilities
Other Long-term Debt, Noncurrent		6,506
Deferred tax liability, net		2,353
Total non-current liabilities		8,859
Total liabilities	2,743	10,081
Shareholders' equity:
Common shares, no par value - unlimited shares authorized; shares outstanding: 2014 - 82,390,217 and 2013 - 82,275,217	404,912	404,470
Additional paid-in capital (Note 10)	33,171	32,487
Accumulated other comprehensive income (Note 11)	11	-59
Accumulated deficit	412,811	393,885
Total shareholders' equity	25,283	43,013
Total liabilities and shareholders' equity	$28,026	$53,094

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014
Shareholders' equity:
Common Stock, Par or Stated Value Per Share	$0

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Income/(Loss) And Comprehensive Income/(Loss) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating income and (expenses):
Exploration, property evaluation and holding costs	($3,991)	($15,600)	($27,536)
Corporate administration and investor relations	-3,798	-5,528	-8,096
Depreciation and amortization	-863	-1,021	-589
Gain/(loss) on disposal of mineral property, net (Note 4 and 5)			2,934
Write-down of mineral property	-750		-250
Write-down of Amayapampa	-4,813
Total operating income/(expense)	-14,215	-22,149	-33,537
Non-operating income and (expenses):
Gain/(loss) on sale of marketable securities	24	-54	192
Realized gain on other investments (Note 4)	155
Unrealized gain/(loss) on other investments (Note 4)	-4,267	-48,499	-50,363
Write down of marketable securities	-138	-275	-39
Write-down of plant and equipment	-3,500	-3,500	-7,117
Interest income	10	36	45
Interest expense	-78	-547
Other income/(expense)	-417	127	16
Total non-operating income/(expense)	-4,711	-52,712	-57,266
Income/(loss) from continuing operations before income taxes	-18,926	-74,861	-90,803
Deferred income tax benefit/(expense)		15,373	20,147
Net income/(loss)	-18,926	-59,488	-70,656
Other comprehensive income/(loss):
Unrealized fair value increase/(decrease) on available-for-sale securities	70	-61	-173
Comprehensive income/(loss)	($18,856)	($59,549)	($70,829)
Basic:
Weighted average number of basic shares outstanding (in shares)	82,294,331	81,813,386	74,351,065
Net income/(loss) per share (in dollars per share)	($0.23)	($0.73)	($0.95)
Diluted:
Weighted average number of diluted shares outstanding (in shares)	82,294,331	81,813,386	74,351,065
Net income/(loss) per share (in dollars per share)	($0.23)	($0.73)	($0.95)

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Shareholders' Equity (USD $)	Common Stock [Member]	Additional Paid-In Capital [Member]	Deficit [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Total
In Thousands, except Share data
Balances at Dec. 31, 2012	$380,119	$24,670	($263,741)	$175
Beginning Balance, shares at Dec. 31, 2012	71,503,883
Shares issued, net of transaction costs	23,464
Number of shares issued in transaction, (Shares)	10,059,615
Compensation options exercised, shares					450,000
Warrants and Options		7,485
Other comprehensive loss				-173
Net loss			-70,656		-59,488
Balances at Dec. 31, 2013	403,583	32,155	-334,397	2	43,013
Ending Balance, shares at Dec. 31, 2013	81,563,498
Shares issued, net of transaction costs	477
Number of shares issued in transaction, (Shares)	711,719
Compensation options exercised, shares					125,000
Warrants and Options	442	684
Other comprehensive loss				70
Net loss			-18,926		-18,926
Balances at Dec. 31, 2014	$404,912	$33,171	($412,811)	$11	$25,283
Ending Balance, shares at Dec. 31, 2014	82,390,217

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements Of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income/(loss) for the period	($18,926)	($59,488)	($70,656)
Adjustments to reconcile net income/(loss) for the period to net cash used in operations:
Depreciation and amortization	863	1,021	589
Stock-based compensation	1,126	742	4,225
Gain on disposal of marketable securities	-24	54	-192
Gain on disposal of mineral property			-2,934
Unrealized (gain)/loss on other investments	4,267	48,499	50,363
Write down of marketable securities	138	275	39
Write-down of non-current assets	5,563	3,500	7,367
Deferred tax (benefit)/expense		-15,373	-20,147
Other non-cash items	-162	-298
Change in working capital account items:
Other current assets	492	1,572	-1,786
Accounts payable, accrued liabilities and other	-395	-5,013	2,977
Net cash used in operating activities	-7,058	-24,509	-30,155
Cash flows from investing activities:
Purchases of marketable securities			-153
Proceeds from sale of marketable securities and short term investments	60	168	494
Proceeds from Sale of Other Investments	10,560
Additions to plant and equipment	-7	-2,199	-2,066
Change in restricted cash		70	64
Proceeds on disposal of mineral property		7,000
Proceeds from non-current asset disposals	1,028		5,500
Net cash (used in)/provided by investing activities	11,641	5,039	3,839
Cash flows from financing activities:
Net proceeds from equity financings		-13	24,472
Proceeds from exercise of warrants			1,425
Proceeds from exercise of compensation options			733
Proceeds from exercise of stock options			94
Net cash provided by financing activities	-6,344	6,664	26,724
Proceeds from Issuance of Secured Debt	0	9,637
Repayments of Debt	6,344	2,960
Increase/(decrease) in cash and cash equivalents	-1,761	-12,806	408
Cash and cash equivalents, beginning of period	5,475	18,281	17,873
Cash and cash equivalents, end of period	$3,714	$5,475	$18,281

Nature_Of_Operations_And_Basis

Nature Of Operations And Basis Of Presentation	12 Months Ended
	Dec. 31, 2014
Liquidity [Abstract]
Nature Of Operations And Basis Of Presentation	1. Nature of Operations
	Vista Gold Corp. and its subsidiaries (collectively, “Vista,” the “Company,” “we,” “our,” or “us”) operate in the gold mining industry. We are focused on the evaluation, acquisition, exploration and advancement of gold exploration and potential development projects, which may lead to gold production or value adding strategic transactions such as earn-in right agreements, option agreements, leases to third parties, joint venture arrangements with other mining companies, or outright sales of assets for cash and/or other consideration.  We look for opportunities to improve the value of our gold projects through exploration drilling and/or technical studies focused on optimizing previous engineering work.
	Our principal asset is our flagship Mt Todd gold project in Northern Territory (“NT”), Australia. We also hold 11.2% (reduced to 5.5% during March 2015, Note 19) of the outstanding common shares of Midas Gold Corp. (“Midas Gold Shares”), non-core projects in Mexico and the United States and royalty interests in projects in Bolivia and Indonesia.

Liquidity

Liquidity	12 Months Ended
	Dec. 31, 2014
Marketable Securities [Abstract]
Liquidity
	2. Liquidity
	These audited consolidated financial statements have been prepared on a going concern basis under which an entity is considered to be able to realize its assets and satisfy its liabilities in the normal course of business. The continuing viability of the Company is dependent upon our ability to secure sufficient funding and ultimately to generate future profits from operations.  The underlying value and recoverability of the amounts shown as mineral properties, plant and equipment, assets held for sale, investments and other property interests in the condensed consolidated balance sheets are also dependent on our ability to continue to fund exploration and development activities that could lead to profitable production or proceeds from the disposition of these assets.  There can be no assurance that we will be successful in disposing of these assets, securing additional funding on terms acceptable to us or at all, or developing profitable operations in the future. These consolidated financial statements do not include any adjustments relating to the recoverability and classification of recorded assets or liabilities which might be necessary should we not be able to continue as a going concern.
	The long-term viability of the Company is dependent upon our ability to secure sufficient funding and ultimately to generate future profits from operations. The underlying value and recoverability of the amounts shown as mineral properties, plant and equipment, assets held for sale, investments and other property interests in our condensed consolidated balance sheets are dependent on our ability to fund exploration and development activities that could lead to profitable production or proceeds from the disposition of these assets. There can be no assurance that we will be successful in disposing of these assets or securing additional funding on terms acceptable to us or at all or developing profitable operations in the future.

Significant_Accounting_Policie

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Significant Accounting Policies [Abstract]
Significant Accounting Policies	3. Significant Accounting Policies
	Principles of Consolidation
	The Consolidated Financial Statements include the accounts of Vista Gold Corp. and more-than-50%-owned subsidiaries that it controls and entities over which control is achieved through means other than voting rights. All significant intercompany balances and transactions have been eliminated.
	Use of Estimates
	The Company’s Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”). The preparation of the Company’s Consolidated Financial Statements requires the Company to make estimates and assumptions that affect the reported amounts of assets and disclosure of contingent liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions relating to capital costs of projects; mine closure and reclamation obligations; useful lives for asset depreciation purposes; valuation allowances for deferred tax assets; the fair value and accounting treatment of financial instruments including marketable securities and stock-based compensation; and asset impairments (including impairments long-lived assets and investments). The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results will differ from these amounts estimated in these financial statements.
	Foreign Currency Translation
	Gains and losses resulting from foreign currency transactions denominated in currency other than the functional currency are recorded at the approximate rate of exchange at the transaction date in other expense, net. For each of the years ended December 31, 2014, 2013 and 2012, we recorded insignificant net foreign currency losses.
	Mineral Properties
	Mineral property acquisition costs, including directly related costs, are capitalized when incurred, and mineral property exploration costs are expensed as incurred.  When we determine that a mineral property can be economically developed in accordance with U.S. GAAP, the costs then incurred to develop such property will be capitalized.  Capitalized costs will be depleted using the units-of-production method over the estimated life of the proven and probable reserves.  If mineral properties are subsequently abandoned or impaired, any undepleted costs will be charged to loss in that period.
	The recoverability of the carrying values of our mineral properties is dependent upon economic reserves being discovered or developed on the properties, permitting, financing, start-up, and commercial production from, or the sale/lease of, or other strategic transactions related to these properties.  Development and/or start-up of any of these projects will depend on, among other things, management’s ability to raise additional capital for these purposes.
	We assess the carrying cost of our mineral properties for impairment whenever information or circumstances indicate the potential for impairment.  This would include events and circumstances such as our inability to obtain all the necessary permits, changes in the legal status of our mineral properties, government actions, the results of exploration activities and technical evaluations and changes in economic conditions, including the price of gold and other commodities or input prices.  Such evaluations compare estimated future net cash flows with our carrying costs and future obligations on an undiscounted basis.  If it is determined that the estimated future undiscounted cash flows are less than the carrying value of the property, a write-down to the estimated fair value will then be reported in our Consolidated Statement of Income/(Loss) for the period.  Where estimates of future net cash flows are not determinable and where other conditions indicate the potential for impairment, management uses its judgment to assess if the carrying value can be recovered and to estimate fair value.
	Impairment
	Carrying values of royalty interests and other long-lived assets, other than mineral properties, are evaluated for impairment at such time that information becomes available indicating that the carrying value may not be recoverable. If it is determined that the fair value is less than the carrying value an impairment charge equal to the difference between the fair value and the carrying value will be recorded in our Consolidated Statements of Income/(Loss) and Comprehensive Income/(Loss).
	Assets held for sale
	Plant and equipment is classified as held for sale when the following conditions are met: (i) assets (or group of assets) are actively marketed for a price reasonable to the fair value at the time of sale; (ii) management has committed to a plan to sell the assets (or group of assets); (iii) the assets (or group of assets) are available for sale in current condition; and (iv) sale is probable within the next 12 months.
	Warrants and Compensation Options
	Warrants and compensation options issued are recorded at grant date fair value using the Black-Scholes option pricing model.
	Stock-Based Compensation
	Under our stock option and long-term incentive plans, common share options and restricted stock units (“RSU”) may be granted to executives, employees, consultants and non-employee directors. Compensation expense for such grants is recorded in the Consolidated Statements of Income/(Loss) and Comprehensive Income/(Loss) as a component of Exploration, property evaluation and holding costs and Corporate administration, with a corresponding increase to Additional paid-in capital in the Consolidated Balance Sheets. The fair values of the options are calculated using the Black-Scholes option pricing model and forfeiture rates based on historic trends. The expense is based on the fair values of the grant on the grant date and is recognized over the vesting period specified for each grant.
	Financial Instruments
	Accounting Standards Codification Topic 820, Fair Value Measurements and Disclosures (“ASC 820”) of the Financial Accounting Standards Board (“FASB”) requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. ASC 820 establishes a fair value hierarchy based on the level of independent, objective evidence surrounding the inputs used to measure fair value. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. ASC 820 prioritizes the inputs into three levels that may be used to measure fair value:
		·	Level 1 – Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
		·	Level 2 – Observable inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data by correlation or other means.
		·	Level 3 – Prices or valuation techniques requiring inputs that are both significant to the fair value measurement and unobservable.
	Our financial instruments include cash and cash equivalents, marketable securities, short- and long-term investments, accounts payable and certain other current assets and liabilities.  Due to the short-term nature of our cash and cash equivalents, accounts payable and certain other current assets and liabilities, we believe that their carrying amounts approximate fair value.  Our marketable securities are classified as available-for-sale. Accordingly, these securities are carried at fair value, which is based upon quoted market prices in an active market and included in Level 1 of the fair value hierarchy.   Our other investments, comprised of Midas Gold Shares, is accounted for using the fair value option based on quoted market prices in an active market and is included in Level 1 of the fair value hierarchy.
	Recent accounting pronouncements
	Elimination of Certain Financial Reporting Requirements, Including an Amendment to Variable Interest Entities Guidance in Topic 810, Consolidation
	In June 2014, the FASB issued guidance related to financial statement presentation for development stage enterprises. The standard removes the definition of a development stage entity from the Master Glossary of the Accounting Standards Codification, thereby removing the financial reporting distinction between development stage entities and other reporting entities from U.S. GAAP. In addition, the standard eliminates the requirements for development stage entities to (1) present inception-to-date information in the statements of income, cash flows, and shareholder equity, (2) label the financial statements as those of a development stage entity, (3) disclose a description of the development stage activities in which the entity is engaged, and (4) disclose in the first year in which the entity is no longer a development stage entity that in prior years it had been in the development stage. The standard is effective for annual reporting periods beginning after December 15, 2014, and interim periods therein, with early adoption permitted. As a result, we adopted this standard as of June 30, 2014 and eliminated since inception information from our financial statements.
	Presentation of Financial Statements - Going Concern (Subtopic 205-40)
	In August 2014, the FASB issued guidance related to financial statement presentation regarding disclosures about an entity’s ability to continue as a going concern.  The new guidance addresses management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. Management’s evaluation should be based on relevant conditions and events that are known and reasonably knowable at the date that the financial statements are issued. The standard is effective for the first interim period within annual reporting periods beginning after December 15, 2016, with early adoption permitted. We do not expect to early adopt this guidance and do not believe that the adoption of this guidance will have a material impact on our financial statements.

Other_Investments

Other Investments	12 Months Ended
	Dec. 31, 2014
Other Investments [Abstract]
Other Investments
	4. Other Investments
	Midas Gold Corp. Combination
	In April 2011, Vista completed a combination with Midas Gold, Inc. (the “Combination”), creating Midas Gold Corp., whereby Vista was issued 30,402,615 Midas Gold Shares. Concurrently with the Combination, we purchased 1,400,000 Midas Gold Shares for an aggregate purchase price of $3,632 as part of a private placement. Following completion of these transactions, Vista held a total of 31,802,615 Midas Gold Shares representing 24.9% of the Midas Gold Shares outstanding as of December 31, 2013.
	During February 2014, we sold 16,000,000 Midas Gold Shares at a price of C$0.80 ($0.73) per Midas Gold share for net proceeds of   $10,560 reducing the total of our Midas Gold Shares to 15,802,615 or approximately 11.2% (reduced to 5.5% in March 2015, Note 19) of the outstanding Midas Gold Shares outstanding, on a non-dilutive basis, as of September 30, 2014.
	In addition, during February 2014, we entered into a lockup agreement whereby agreed not to sell any of the Midas Gold Shares we hold for a period of 12 months.  As the lockup period expires in February 2015, we have reclassified our investment in Midas Gold Shares from non-current assets as of December 31, 2013 to current assets as of December 31, 2014.
	Upon initial recognition of its investment in the Midas Gold Shares, Vista elected to apply the fair value option, and as such, the investment is recorded at fair value in the Consolidated Balance Sheets.  Subsequent changes in fair value are recorded in the Consolidated Statements of Income/(Loss) and Comprehensive Income/(Loss) in the period in which they occur.
	The following table summarizes our investment in Midas Gold Shares as at December 31, 2014 and 2013.
				Years Ended December 31,
				2014		2013
	Fair value at beginning of period		$	20,990	$	69,489
	Sale of Midas Gold Shares, net of costs to sell			-10,560		-
	Unrealized gain/(loss) based on the fair value at the end of the period			-4,267		-48,499
	Fair value at end of period		$	6,163	$	20,990
	Estimated tax benefit/(expense) for the period		$	1,478	$	17,915
	Midas Gold shares held at the end of the period			15,802,615		31,802,615
	The change in the presentation of the Company’s current and non-current deferred tax balances during 2014 is primarily attributable to the re-classification, from non-current to current, of U.S. deferred tax liabilities associated with our investment in Midas Gold Shares.  The classification of the deferred tax balances was also impacted by the sale of a portion of our Midas Gold Shares, as discussed above.  Our sale of Midas Gold Shares in February 2014 resulted in a reduction of current deferred tax assets for U.S. net operating loss carry forwards and of non-current U.S. deferred tax liabilities associated with our Midas Gold Shares investment.
	As we elected the fair value option to account for our investment in Midas Gold Shares, we are required to provide summarized information for the period in which we held a greater than 20% interest in the outstanding Midas Gold Shares.  As a result, summarized financial information for Midas Gold Corp. as of December 31, 2013 and 2012 and for the years ended December 31, 2013 and 2012, which are prepared in accordance with International Financial Reporting Standards and filed on March 14, 2014, is as follows.
			31-Dec-13		31-Dec-12
	Total current assets	$	14,742	$	19,864
	Total non-current assets		186,673		175,957
	Total current liabilities		2,432		5,108
	Total non-current liabilities		919		380
	Total equity		198,064		190,333
			Year ended December 31,
			2013			2012
	Operating expense	$	3,908		$	7,813
	Net loss		3,796			7,180

Mineral_Properties

Mineral Properties	12 Months Ended
	Dec. 31, 2014
Mineral Properties [Abstract]
Mineral Properties	5. Mineral Properties
			At December 31, 2014		At December 31, 2013
	Mt. Todd, Australia	$	2,146	$	2,146
	Guadalupe de los Reyes, Mexico		2,224		2,752
	Los Cardones, Mexico		1,036		1,536
	Long Valley, United States		-		750
		$	5,406	$	7,184
	Guadalupe de los Reyes
	During January 2014, we announced that we signed a non-binding letter of intent (the “LOI”) to option our interest in the Guadalupe de los Reyes gold/silver project in Sinaloa, Mexico (the “Guadalupe de los Reyes gold/silver project”) to Cangold Limited (“Cangold”).
	The LOI provided that a non-refundable $50 payment be made during January 2014 to Vista for which Cangold was given a 90 day period of exclusivity (the “Exclusivity Period”) to complete due diligence and negotiate and enter into a definitive option agreement with Vista (the “Option Agreement”).
	During April 2014, Minera Gold Stake S.A. de C.V. (“MGS”), Vista’s wholly-owned subsidiary, entered into the Option Agreement to option its interest in the Guadalupe de los Reyes gold/silver project to Cangold.
	Pursuant to the terms of the Option Agreement, Vista has granted Cangold the right to earn a 70% interest in the Guadalupe de los Reyes gold/silver project by:
		·		making payments totaling $5,000 in five payments over a three-year period, with payments totaling $1,000 in the first year (comprised of $500 received in 2014 and $500 received in February 2015 (postponed from January 2015)),  $1,500 in the second year and $2,500 in the third year;
		·		operating the Guadalupe de los Reyes gold/silver project maintaining the concessions comprising the Guadalupe de los Reyes gold/silver project in good standing; and
		·		fulfilling all of the obligations of MGS to the Ejido La Tasajera (the ”Ejido”) as set out in the temporary occupation contract between MGS and the Ejido.
	The Option Agreement provides that all cash payments are non-refundable and optional to Cangold, and in the event Cangold fails to pay any of the required amounts on the scheduled dates or fails to comply with its other obligations, the Option Agreement will terminate and Cangold will have no interest in the Guadalupe de los Reyes gold/silver project. Provided it is not in breach of the Option Agreement, Cangold may at its discretion advance the above payment schedule and exercise the initial option for a 70% interest in the Guadalupe de los Reyes gold/silver project any time during the three-year period.
	Subject to Cangold earning a 70% interest in the Guadalupe de los Reyes gold/silver project, MGS has granted Cangold the option to earn the remaining 30% interest in the Guadalupe de los Reyes gold/silver project, by notifying MGS of a production decision no later than the tenth anniversary of exercising the first option and by making a cash payment to Vista of $3,000 plus an additional cash payment based on a formula that includes the growth, if any, in estimated National Instrument 43-101 – Standards of Disclosure for Mineral Projects compliant Measured and Indicated mineral resources of the Guadalupe de los Reyes gold/silver project, and the then prevailing spot gold price (“Escalator Payment”).
	Should Cangold determine not to put the Guadalupe de los Reyes gold/silver project into production, the Option Agreement provides MGS with the right to buy back Cangold’s 70% interest in the Guadalupe de los Reyes gold/silver project for a cash payment of $5,000 plus the Escalator Payment described above.  If MGS does not exercise its buyback option, MGS will still retain a right of first refusal should Cangold elect to sell its 70% interest in the Guadalupe de los Reyes gold/silver project to a third party.
	Los Cardones
	During October 2013, we sold our 100% debt and equity participation in the Los Cardones gold project located in Baja California Sur, Mexico (“Los Cardones Sale”) to Invecture and RPG Structrued Finance S.a.R.L. (the “Purchasers”) for a total of $13,000 ($7,000 of which was paid in October 2013 and $6,000 was payable January 2014 (the “Subsequent Payment”) subject to the Purchasers’ option to elect to not make the Subsequent Payment).  If the Purchasers elect to not make the Subsequent Payment, we would retain all payments already received and 100% of the Los Cardones gold project would be returned to us. In January 2014, the due date for the Subsequent Payment was extended to July 31, 2014 (the “First Extension”) for additional consideration of $250 payable on July 31, 2014. As a result of permitting delays, we and the Purchasers agreed to an additional extension of the due date of the Subsequent Payment to January 30, 2015 (the “Second Extension”) for additional consideration of $250. The Company received a cash payment of $500 comprising the aggregate consideration for the grant of the First Extension and the Second Extension during August 2014. In October 2014, Invecture announced that the Los Cardones gold project, had been suspended because the conditions for its development were not favorable at that time.  Since making this announcement, there have been no apparent significant favorable changes to incentivize Invecture to lift the suspension. In January 2015 we agreed to amend the payment terms (the “Amendment”) of the acquisition of the Los Cardones gold project. Under the Amendment, the Company received a payment of $3,000 cash from the Purchasers as full and final payment for 100% of the Company’s interest in the project. This will result in a realized gain of approximately $2,000 during 2015.
	Long Valley
	We acquired the Long Valley gold project in 2003.  During 2014, we completed a review of the permitting process and probable impediments to developing the project, and concluded that the permitting process would consume an inordinate amount of our limited resources and time. Accordingly, we will not attempt to advance this project in the foreseeable future. As a result, an impairment amount equal to the $750 carrying value has been included in our Consolidated Statements of Income/(Loss) and Comprehensive Income/(Loss) for the year ended December 31, 2014.

Plant_And_Equipment

Plant And Equipment	12 Months Ended
	Dec. 31, 2014
Plant And Equipment [Abstract]
Plant And Equipment
	6. Plant and Equipment
			31-Dec-14						31-Dec-13
			Cost		Accumulated depreciation		Net		Cost		Accumulated depreciation		Net
	Mt Todd, Australia	$	5,483	$	2,756	$	2,727	$	5,476	$	1,993	$	3,483
	Guadalupe de los Reyes, Mexico		17		8		9		17		5		12
	Corporate, United States		403		297		106		780		577		203
	Plant and equipment	$	5,903	$	3,061	$	2,842	$	6,273	$	2,575	$	3,698
			31-Dec-14						31-Dec-13
			Book value beginning of period		Write-downs during the period		Book value end of period		Book value beginning of period		Write-downs during the period		Book value end of period
	Assets held for sale	$	6,500	$	-	$	6,500	$	10,000	$	3,500	$	6,500
	During the year ended December 31, 2013, given the relatively weak market conditions in the gold mining sector, based on an updated independent assessment from a third party, we recorded a Level 3 (Note 14) impairment charge of $3,500 to write down the value of the mill equipment which is held for sale.  The impairment charge is based on an estimated sale value of $7,300, net of commissions and other costs to sell of approximately $800 and has been included in our Consolidated Statements of Income/(Loss) and Comprehensive Income/(Loss) for the year ended December 31, 2013.  There was  no such charge for the year ended December 31, 2014.

Amayapampa

Amayapampa	12 Months Ended
	Dec. 31, 2014
Asset Impairment Charges [Abstract]
Asset Impairment Charges [Text Block]	7. Amayapampa Interest
	As of December 31, 2014, the Company owned an interest in the Amayapampa gold project in Bolivia, comprised of a right to receive an NSR royalty on future gold production, if any, plus certain additional cash payments if the project successfully starts commercial production.  The fair value of the Amayapampa interest had been estimated at $4,813.
	In December 2014, the owner of the Amayapampa gold project completed the sale of 100% of the project to a private investor. Accordingly, we evaluated the carrying value of our interest in Amayapampa.  Given the frequency of ownership changes over the past several years, the conditions in gold market, and the political climate in Bolivia, we concluded that there is no more than a remote possibility that the Amayapampa project will be successfully developed and operated within the foreseeable future, and an impairment amount equal to the $4,813 carrying value has been included in our Consolidated Statements of Income/(Loss) and Comprehensive Income/(Loss) for the year ended December 31, 2014.

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	8. Debt
	During March 2013, the Company entered into a credit agreement with Sprott Resources Lending Partnership (the “Lender”) for purposes of establishing a C$10,000 loan facility (the “2013 Facility”) ($9,637 proceeds net of transaction costs). The 2013 Facility bore an interest rate of 8% per annum, payable monthly and originally matured March 2014, with early repayment of the 2013 Facility allowed, at the Company’s option, provided that at least four months interest had been paid. In September 2013, the Company and the Lender agreed to extend the maturity date of the 2013 Facility to March 2015.
	In addition to interest, the 2013 Facility provided the Lender total fees of 3.5% of the 2013 Facility amount, including C$100 ($99) in cash and the issuance of 125,798 Vista common shares. As consideration for the extended maturity date, we paid the Lender an extension fee comprised of 486,382 Vista common shares.
	The 2013 Facility was secured by a general security agreement with certain exclusions. As additional security, the Company pledged all the Company’s Midas Gold Shares (Note 4).
	During October 2013, in accordance with the terms of the 2013 Facility, the Company repaid approximately $2,960 towards the 2013 Facility principal outstanding using proceeds from the Los Cardones sale (Note 5).
	During February 2014, in accordance with the terms of the 2013 Facility, the Company repaid approximately $5,000 towards the 2013 Facility principal then outstanding using proceeds from the sale of Midas Gold Shares (Note 4).  During March 2014, we repaid the outstanding principal balance of  $1,344 in full.

Capital_Stock

Capital Stock	12 Months Ended
	Dec. 31, 2014
Capital Stock [Abstract]
Capital Stock	9. Capital Stock
	Private Placement, July 2012
	During July 2012, we closed a private placement of 5,000,000 units (the “July 2012 Units”) for gross proceeds of $15,000 (the “July 2012 Offering”).  Each July 2012 Unit consisted of one common share in the capital of the Company and one-half of one common share purchase warrant (each full warrant, a “July 2012 Warrant”).  Each July 2012 Warrant entitled the holder thereof to purchase one common share at a price of $3.60 per share (subject to adjustment in certain circumstances) and was exercisable for a period of 24 months from the closing of the July 2012 Offering.  In connection with the July 2012 Offering, we incurred $770 in commissions and other costs and issued a total of 166,667 compensation warrants to finders that provided services in respect of subscriptions for 3,333,334 July 2012 Units.  Each compensation warrant entitled the holder thereof to purchase one common share at a price of $3.18 per share (subject to adjustment in certain circumstances) for a period of 24 months from the closing of the July 2012 Offering.  On September 29, 2012, we filed a registration statement on Form S-3 related to the resale by the purchasers of the July 2012 Units of the Common Shares issued as part of the Units and Common Shares issuable upon exercise of the July 2012 Warrants and compensation warrants.   All of the July 2012 Warrants expired, unexercised, in July 2014.
	Public Offering, December 2012
	During December 2012, we closed a public offering of 4,182,550 units (the “December 2012 Units”), which included 545,550 December 2012 Units issued pursuant to the full exercise of the underwriters’ over-allotment option, for gross proceeds of $11,500 (the “December 2012 Offering”).  Each December 2012 Unit consisted of one common share in the capital of the Company and one-half of one common share purchase warrant (each full warrant, a “December 2012 Warrant”).  Each December 2012 Warrant entitled the holder thereof to purchase one common share at a price of $3.30 per share (subject to adjustment in certain circumstances) and was exercisable for a period of 24 months from the closing of the December 2012 Offering.  In connection with the December 2012 Offering, the Company incurred approximately $1,258 in commissions and other costs. All of the December 2012 Warrants expired, unexercised, in December 2014.
	Other issuances
	During the year ended December 31, 2014, we issued 115,000 common shares in connection with the vesting of RSUs.
	During the year ended December 31, 2013, we issued 99,539 common shares in connection with the vesting of RSUs and 612,180 common shares as part of the 2013 Facility (Note 8) which had a fair value of $490 at the time of issuance.
	On March 13, 2012, the Company received $733 in proceeds from the issuance of 225,000 common shares resulting from the exercise of 225,000 compensation options issued in April 2011.  On April 18, 2012, the Company received $1,100 in proceeds from the issue of 478,261 common shares resulting from the exercise of 478,261 compensation warrants issued in October 2010. On August 10, 2012, the Company received $265 in proceeds from the issuance of 115,217 common shares resulting from an exercise of 115,217 compensation warrants issued in October 2010.

Additional_PaidIn_Capital

Additional Paid-In Capital	12 Months Ended
	Dec. 31, 2014
Additional Paid-In Capital [Abstract]
Additional Paid-In Capital
	10. Additional Paid-in Capital
	Warrants
	Warrant activity is summarized in the following table:
			Warrants outstanding		Weighted average exercise price per share		Weighted average remaining life (yrs.)		Intrinsic value
	As of December 31, 2012		19,977,743	$	4.25		2.6	$	-
	As of December 31, 2013		19,977,743	$	4.63		1.6	$	-
	Expired		-4,757,941
	As of December 31, 2014		15,219,802	$	5.00		0.8	$	-
	The 15,219,802 outstanding warrants expire in October 2015.   The exercise price for the 15,219,802 warrants is $5.00 per common share.
	Compensation Options
			Compensation options outstanding			Weighted average exercise price per share		Expiry date		Weighted average remaining life (yrs.)
	As of December 31, 2012		225,000		$	3.30		Apr-13		0.3
	Exercised		-225,000
	As of December 31, 2013		-
	As of December 31, 2014		-
	Stock-Based Compensation
	Under our Stock Option Plan (the “Plan”) and our Long-Term Equity Incentive Plan (the “LTIP”), we may grant options and/or RSUs or restricted stock awards to our directors, officers, employees and consultants.  The combined maximum number of our Common Shares that may be reserved for issuance under the Plan and the LTIP is a variable number equal to 10% of the issued and outstanding Common Shares on a non-diluted basis.    Options and RSUs under the Plan and LTIP, respectively, are granted from time to time at the discretion of the Board, with vesting periods and other terms as determined by the Board.  Stock-based compensation expense for the years ended December 31, 2014, 2013 and 2012 is as follows:
			Year ended December 31,
			2014		2013		2012
	Stock options	$	160	$	370	$	1,081
	Restricted stock units		966		372		3,144
		$	1,126	$	742	$	4,225
	As of December 31, 2014, stock options and RSUs had unrecognized compensation expense of $26 and $879, respectively, which is expected to be recognized over a weighted average period of 3.99 and 1.36 years, respectively.
	Stock Options
	A summary of option activity under the Plan as of December 31, 2014 and 2013 and changes during the period then ended is set forth in the following table:
			Number of options		Weighted average exercise price per option		Weighted average remaining contractual term		Aggregate intrinsic value
	Outstanding - December 31, 2012		3,102,500	$	2.80		2.68	$	637
	Granted		985,000		0.36
	Cancelled/Forfeited		-450,000		3.07
	Expired		-755,000		3.32
	Outstanding - December 31, 2013		2,882,500		1.79		3.07		54
	Granted		175,000		0.52
	Cancelled/Forfeited		-125,000		3.16
	Expired		-675,000		1.85
	Outstanding - December 31, 2014		2,257,500	$	1.60		3.02	$	-
	Exercisable - December 31, 2014		2,011,250	$	1.75		2.90	$	-
	A summary of our unvested stock options as of December 31, 2014 and 2013 and changes during the period then ended is set forth in the following table:
					Number of options		Weighted average grant-date fair value per option		Weighted average remaining amortization period (Years)
	Unvested - December 31, 2012				300,000	$	1.47
	Granted				985,000		0.22
	Vested				-546,250		0.90
	Unvested - December 31, 2013				738,750		0.22
	Granted				175,000		0.30
	Vested				-667,500		0.24
	Unvested - December 31, 2014				246,250	$	0.22		3.99
	The fair value of stock options granted to employees, directors and consultants was estimated at the grant date using the Black-Scholes option pricing model using the following assumptions:
						Years ended December 31,
				2014				2013			2012
	Expected volatility			69.17%				72.26%			81.69%	-	83.67%
	Risk-free interest rate			1.75%				1.70%			0.77%	-	0.88%
	Expected life (years)			5				5			5
	Dividend yield			N/A				N/A			N/A
	Forfeiture rate			10%				15%			15%
	Option pricing models require the input of highly subjective assumptions, including the expected price volatility.  Expected price volatility is based on the historical volatility of our common shares.  Changes in the subjective input assumptions can materially affect the fair value estimate.  The expected term of the options granted represents the period of time that the options granted are expected to be outstanding.  The risk-free rate for the periods within the contractual term of the option is based on the U.S. Treasury yield curve in effect at the date of grant.
	Restricted Stock Units
	The following table summarizes the RSU activity under the LTIP as of December 31, 2014 and 2013 and changes during the years then ended:
			Number of units		Weighted average grant-date fair value per RSU
	Unvested - December 31, 2012		1,994,507	$	3.50
	Cancelled		-1,133,592		2.58
	Vested		-116,875		3.51
	Granted		1,850,424		0.82
	Unvested - December 31, 2013		2,594,464		2.00
	Cancelled		-865,635		3.42
Vested		-115,000		3.84
Granted		2,079,000		0.46
Unvested - December 31 , 2014		3,692,829	$	0.74
A portion of the RSU awards vest on a fixed future date provided the recipient continues to be affiliated with Vista on that date.  Other RSU awards vest subject to certain performance and market criteria, including the accomplishment of certain corporate objectives and the Company’s share price performance.  The vesting period for RSUs is at least one year.  The average forfeiture is approximately 29%, based on historical market conditions.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2014
Accumulated Other Comprehensive Income [Abstract]
Accumulated Other Comprehensive Income	11. Accumulated Other Comprehensive Income/(Loss)
			Accumulated other comprehensive income/(loss)		Accumulated other comprehensive income, net of tax
	As of December 31, 2012	$	2	$	2
	Other comprehensive gain/(loss) due to change in fair market value of marketable securities during period before reclassifications		268		228
	Reclassifications due to realization of gain/(loss) on sale of marketable securities (1)		-54		-46
	Reclassifications due to write-down of marketable securities (2)		-275		-234
	As of December 31, 2013		-59		-50
	Other comprehensive gain/(loss) due to change in fair market value of marketable securities during period before reclassifications		21		18
	Reclassifications due to realization of gain/(loss) on sale of marketable securities (1)		-24		-20
	Reclassifications due to write-down of marketable securities (2)		73		62
	As of December 31, 2014	$	11	$	10

Weighted_Average_Common_Shares

Weighted Average Common Shares	12 Months Ended
	Dec. 31, 2014
Weighted Average Common Shares [Abstract]
Weighted Average Common Shares	12.  Weighted Average Common Shares
		At December 31,
		2014	2013
	Basic common shares	82,294,331	81,813,386
	Diluted common shares	82,294,331	81,813,386
	Stock options to purchase 2,257,500 and 2,882,500 common shares, unvested RSUs representing 3,692,829 and 2,594,464 common shares, and warrants to purchase 15,219,802 and 19,977,743 common shares were outstanding at December 31, 2014 and 2013, respectively, but were not included in the computation of diluted weighted average common shares outstanding because their effect would have been anti-dilutive.

Commitments_And_Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies [Abstract]
Commitments And Contingencies	13. Commitments and Contingencies
	Our exploration and development activities are subject to various laws and regulations governing the protection of the environment. These laws and regulations are continually changing and are generally becoming more restrictive. As such, the future expenditures that may be required for compliance with these laws and regulations cannot be predicted. We conduct our operations to minimize effects on the environment and believe our operations are in compliance with applicable laws and regulations in all material respects. The Company has accrued $250 with respect to loss contingencies related to a contract dispute that has not yet been resolved. It is possible that the final settlement may vary from this amount; however, an estimate of the final settlement cannot reasonably be determined at this time.
	Under our agreement with the Jawoyn Association Aboriginal Corporation (the  “JAAC”), we must offer the JAAC the opportunity to establish a joint venture with Vista holding 90% and the JAAC holding a 10% participating interest in the Mt Todd gold project. In addition, the JAAC will be entitled to an annual cash payment, or payment in kind, equal to 1% of the value of the annual gold production from the current mining licenses, and a 1% NSR royalty on other metals, subject to a minimum payment of A$50 per year.

Financial_Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2014
Financial Instruments [Abstract]
Financial Instruments
	14.  Fair Value Accounting
	The following table sets forth the Company’s assets measured at fair value by level within the fair value hierarchy. As required by accounting guidance, assets are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
				Fair value at December 31, 2014
				Total		Level 1		Level 3
	Assets:
		Marketable securities	$	137	$	137	$	-
		Other Investments (Midas Gold Shares)		6,163		6,163		-
		Mill Equipment		6,500		-		6,500
				Fair value at December 31, 2013
				Total		Level 1		Level 3
	Assets:
		Cash equivalents	$	3,000	$	3,000	$	-
		Marketable securities		176		176		-
		Other Investments (Midas Gold Shares)		20,990		20,990		-
		Amayapampa interest (Note 7)		4,813		-		4,813
		Mill Equipment		6,500		-		6,500
	Our cash equivalent instruments, marketable securities and investment in Midas Gold Shares are classified as Level 1 of the fair value hierarchy as they are valued at quoted market prices in an active market.
	The Company incurred a Level 3 impairment loss on certain mill equipment (Note 6) for the year ended December 31, 2013. This equipment was valued at $6,500 at December 31, 2014 and 2013 based on a third party assessment of the projected sale value, net of commissions and other costs to sell, giving full consideration to current market conditions and an orderly sale process. This valuation was used to determine the Level 3 impairment charge taken in 2013. The mill equipment is categorized as assets held for sale on the Consolidated Balance Sheets.
	During 2014, the Company wrote-off the Level 3 non-recurring carrying values of the Amayapampa interest (Note 7) and the Long Valley gold project (Note 5).
	At December 31, 2014, the assets classified within Level 3 of the fair value hierarchy represent 51% of the total assets measured at fair value. There were no transfers between levels nor were there any changes in valuation methods in 2014.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information and Material NonCash Transactions	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Information and Material Non Cash Transactions [Abstract]
Supplemental Cash Flow Information and Material NonCash Transactions	15. Supplemental Cash Flow Information and Material Non-Cash Transactions
	As of December 31, 2014 and 2013, all of our cash was held in liquid bank deposits and/or treasury bills.
	There were no significant non-cash transactions for the year ended December 31, 2014.
	Significant non-cash transactions during the year ended December 31, 2013 included the issuance of 612,180 common shares in connection with the 2013 Facility (Note 8). In addition, during December 2013, we entered into a share purchase agreement (the “Purchase Agreement”) to convert our interest in the Awak Mas gold project into a net smelter return royalty (“Royalty”) on the project.  The Purchase Agreement provides for the termination of the JV Agreement and additional option agreements and the acquisition of 100% of the outstanding shares of Vista Gold (Barbados) Corp, the entity that indirectly holds the Awak Mas gold project. In exchange, (a) Awak Mas Holdings Pty. Ltd. (“AM Holdings”) agreed to forego certain cash payments due to have been paid by Vista as AM Holdings completed the earn-in of its interest in the project and (b) Vista will receive a Royalty of 2% on the first 1.25 million ounces of gold production and 2.5% on the next 1.25 million ounces of gold production from the Awak Mas gold project.
	Significant non-cash transactions during the year ended December 31, 2012 included the issuance of 166,667 warrants as compensation to the finders that provided services in connection with our July 2012 Offering (Note 9).
	During the years ended December 31, 2014 and 2013, we paid interest associated with the 2013 Facility of $78 and $551, respectively.  No interest was incurred during 2012.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Taxes [Abstract]
Income Taxes
	16. Income Taxes
	The Company’s provision for income taxes for the year ended December 31, 2014, 2013 and 2012, consists of a deferred tax benefit of $nil,  and $15,373 and $20,147, respectively. The Company has not recognized a current income tax expense or benefit due to overall loss positions. The deferred income tax benefit being recognized at December 31, 2013 and 2012 relates primarily to the unrealized loss and underlying basis difference in the Company’s investment in Midas Gold Shares (Note 4).
	Tax Expense
	Income tax expense consists of the following:
					Years ended December 31,
				2014			2013			2012
	Deferred income tax benefit
		U.S.		$	-		$	-15,373		$	-20,147
		Canada			-			-			-
		Other Foreign			-			-			-
	Total tax benefit			$	-		$	-15,373		$	-20,147
	Source of Loss
	The Company’s U.S. and foreign source loss is as follows:
				Years ended December 31,
			2014			2013			2012
	U.S.		$	-6,705		$	-49,124		$	-52,448
	Canada			-7,750			-9,540			-11,962
	Other Foreign			-4,471			-16,197			-26,393
			$	-18,926		$	-74,861		$	-90,803
	Rate Reconciliation
	A reconciliation of the combined income taxes at the statutory rates and the Company’s effective income tax benefit is as follows:
				Years ended December 31,
				2014		2013		2012
	Income taxed at statutory rates		$	-7,314	$	-28,916	$	-34,860
	Increase (decrease) in taxes from:
		Stock-based compensation		41		13		147
		Meals and entertainment		3		9		3
		Loss related to Mexico		-		-2,632		-
		Other adjustments		-		-9		6
		Adjustment due to capital transactions		-		-60		-733
		Imputed interest		3		3		24
		Realized fx gain (loss) on intercompany balances		-		-3		-3
		Prior year provision to actual adjustments		-4,511		9,961		-40
		Differences in tax rates		541		3,451		3,905
		Effect of foreign exchange		276		-		-340
		Change in effective tax rate		-1		-407		-333
		Expiration of NOLs		189		437		70
		Change in valuation allowance		10,773		2,780		12,007
	Income tax (benefit)/expense		$	-	$	-15,373	$	-20,147
	Deferred Taxes
	Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The significant components of our deferred tax assets and liabilities as at December 31 are as follows:
			December 31,
			2014		2013		2012
	Deferred income tax assets
	Excess tax basis over book basis of property, plant and equipment	$	7,893	$	7,496	$	8,001
	Marketable securities		798		661		62
	Operating loss carryforwards		35,001		36,367		37,635
	Capital loss carryforwards		10,212		5,474		2,630
	Other		2,891		1,541		3,219
	Unrealized foreign exchange on loans		-		79		217
	Total future tax assets		56,795		51,618		51,764
	Valuation allowance for future tax assets		-54,397		-43,955		-41,817
			2,398		7,663		9,947
	Deferred income tax liabilities
	Other investments		1,916		7,181		24,839
	Amayapampa disposal consideration		482		482		482
			2,398		7,663		25,321
	Total Deferred Taxes	$	-	$	-	$	-15,374
	Valuation Allowance on Canadian and Foreign Tax Assets
	We establish a valuation allowance against the future income tax assets if, based on available information, it is more likely than not that all of the assets will not be realized.  The valuation allowance of $54,397, $43,955 and $41,817 at December 31, 2014, 2013 and 2012, respectively, relates mainly to net operating loss carryforwards, in Canada and other foreign tax jurisdictions, where the utilization of such attributes is not more likely than not.  The Company continually assesses both positive and negative evidence to determine whether it is more likely than not that deferred tax assets can be realized prior to their expiration.
	Loss Carryforwards
	The Company has available income tax losses of $59,062, which may be carried forward and applied against future taxable income when earned.
	The losses expire as follows:
		Noncapital
		Canada (1)			U.S.			Mexico			Barbados		Total
2014		$	-		$	-		$	-		$	-	$	-
2015			-889			-			-			-2		-891
2016			-			-			-			-1		-1
2017			-			-			-			-6		-6
2018			-			-			-			-20		-20
2019			-			-			-			-42		-42
2020			-			-			-			-20		-20
2021			-			-			-			-31		-31
2022			-			-			-6			-23		-29
2023			-			-			-397			-		-397
2024			-			-			-140			-		-140
2025			-			-			-			-		-
2026			-1,027			-1,166			-			-		-2,193
2027			-847			-1,700			-			-		-2,547
2028			-5,245			-1,719			-			-		-6,964
2029			-4,022			-1,970			-			-		-5,992
2030			-5,032			-1,827			-			-		-6,859
2031			-3,806			-3,407			-			-		-7,213
2032			-6,397			-2,323			-			-		-8,720
2033			-9,576			-3,098			-			-		-12,674
2034			-4,323			-								-4,323
		$	-41,164		$	-17,210		$	-543		$	-146	$	-59,062
(1) Canadian capital loss carryforwards of $36,524 and Australian NOLs of $67,064, which do not expire and are therefore not included above.
Of the total Canadian net operating loss, $18,628 relates to an equity component for share-issuance cost deduction for which no tax benefit for financial reporting purposes in the income statement will be recognized.
Accounting for uncertainty in taxes
Accounting Standards Codification Topic 740 guidance requires that the Company evaluate all income tax positions taken, and recognize a liability for any uncertain tax positions that are not more likely than not to be sustained by the tax authorities.  As of December 31, 2014, the Company believes it has no liability for unrecognized tax positions.  If the Company were to determine there were any uncertain tax positions, the Company would recognize the liability and related interest and penalties within income tax expense.
Tax statute of limitations
The Company files income tax returns in Canada, U.S. federal and state jurisdictions and other foreign jurisdictions.  There are currently no tax examinations underway for these jurisdictions.  Furthermore, the Company is no longer subject to Canadian tax examinations by the Canadian Revenue Authority for years ended on or before December 31, 2003 or U.S. federal income tax examinations by the Internal Revenue Service for years ended on or before December 31, 2011.  Some U.S. state and other foreign jurisdictions are still subject for tax examination for years ended on or before December 31, 2010.
Although certain tax years are closed under the statute of limitations, tax authorities can still adjust losses being carried forward into open years.

Geographic_And_Segment_informa

Geographic And Segment information	12 Months Ended
	Dec. 31, 2014
Geographic And Segment information [Abstract]
Geographic And Segment Information	17. Geographic and Segment information
	The Company has one reportable operating segment, consisting of evaluation, acquisition, and exploration activities.  We evaluate, acquire, explore and advance gold exploration and potential development projects, which may lead to gold production or value adding strategic transactions.  These activities are focused principally in Australia and North America. We reported no revenues during the years ended December 31, 2014, 2013 and 2012.  Geographic location of mineral properties and plant and equipment is provided in Notes 5 and 6, respectively.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	18. Related Party Transactions
	On April 1, 2009, we entered into an agreement with Sierra Partners LLC (“Sierra”) pursuant to which Sierra provided us with support and analysis of our general corporate finance and strategy efforts.  A founder and partner of Sierra is also one of our directors. As compensation for these services, we paid Sierra a monthly retainer fee of $10 for the duration of the agreement, which was terminated on August 31, 2013.  We had made cash payments to Sierra under the agreement totaling $80 and $120 for each year ended December 31, 2013 and 2012, respectively.

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events [Text Block]	19. Subsequent Events
	Los Cardones Payment
	In January 2015, we entered into the Amendment with respect to the acquisition of the Los Cardones gold project. Under the Amendment, the Company received a payment of $3,000 cash from the Purchasers as full and final payment for 100% of the Company’s interest in the project.  See Note 5.
	Sale of Midas Gold Shares
	In February 2015, we executed an agency agreement with an agent (the “Agent”) under which the Agent has arranged to sell up to 8,000,000 Midas Gold Shares at a price of C$0.46 per Midas Gold Share for aggregate gross proceeds of up to C$3,680 (the “Sale”). A portion of the Midas Gold Shares may be sold pursuant to a finder's agreement between us and a finder (the "Finder") on the same offering terms. In consideration for the services to be provided by the Agent, and if applicable, the Finder, in connection with sale of the Midas Gold Shares, the Agent or the Finder (as applicable) will receive a cash fee equal to 4% of the gross proceeds from the sale of the Midas Gold Shares.
	Following the sale of the Midas Gold Shares, our holding would be reduced to 7,802,615 common shares of Midas Gold Corp, representing 5.5% of the outstanding common shares of Midas Gold Corp. We have agreed that following the closing of the Sale, we will not sell any of the remaining Midas Gold Shares for a period of six months following closing.
	Guadalupe de los Reyes Payment
	In February 2015, we received the $500 option payment from Cangold which had been postponed from January 2015.  See Note 5.

Significant_Accounting_Policie1

Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2014
Principles of Consolidation	Principles of Consolidation
	The Consolidated Financial Statements include the accounts of Vista Gold Corp. and more-than-50%-owned subsidiaries that it controls and entities over which control is achieved through means other than voting rights. All significant intercompany balances and transactions have been eliminated.
Use of Estimates	Use of Estimates
	The Company’s Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”). The preparation of the Company’s Consolidated Financial Statements requires the Company to make estimates and assumptions that affect the reported amounts of assets and disclosure of contingent liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions relating to capital costs of projects; mine closure and reclamation obligations; useful lives for asset depreciation purposes; valuation allowances for deferred tax assets; the fair value and accounting treatment of financial instruments including marketable securities and stock-based compensation; and asset impairments (including impairments long-lived assets and investments). The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results will differ from these amounts estimated in these financial statements.
Mineral Property	Mineral Properties
	Mineral property acquisition costs, including directly related costs, are capitalized when incurred, and mineral property exploration costs are expensed as incurred.  When we determine that a mineral property can be economically developed in accordance with U.S. GAAP, the costs then incurred to develop such property will be capitalized.  Capitalized costs will be depleted using the units-of-production method over the estimated life of the proven and probable reserves.  If mineral properties are subsequently abandoned or impaired, any undepleted costs will be charged to loss in that period.
	The recoverability of the carrying values of our mineral properties is dependent upon economic reserves being discovered or developed on the properties, permitting, financing, start-up, and commercial production from, or the sale/lease of, or other strategic transactions related to these properties.  Development and/or start-up of any of these projects will depend on, among other things, management’s ability to raise additional capital for these purposes.
	We assess the carrying cost of our mineral properties for impairment whenever information or circumstances indicate the potential for impairment.  This would include events and circumstances such as our inability to obtain all the necessary permits, changes in the legal status of our mineral properties, government actions, the results of exploration activities and technical evaluations and changes in economic conditions, including the price of gold and other commodities or input prices.  Such evaluations compare estimated future net cash flows with our carrying costs and future obligations on an undiscounted basis.  If it is determined that the estimated future undiscounted cash flows are less than the carrying value of the property, a write-down to the estimated fair value will then be reported in our Consolidated Statement of Income/(Loss) for the period.  Where estimates of future net cash flows are not determinable and where other conditions indicate the potential for impairment, management uses its judgment to assess if the carrying value can be recovered and to estimate fair value.
Impairment	Impairment
	Carrying values of royalty interests and other long-lived assets, other than mineral properties, are evaluated for impairment at such time that information becomes available indicating that the carrying value may not be recoverable. If it is determined that the fair value is less than the carrying value an impairment charge equal to the difference between the fair value and the carrying value will be recorded in our Consolidated Statements of Income/(Loss) and Comprehensive Income/(Loss).
Assets held for sale	Assets held for sale
	Plant and equipment is classified as held for sale when the following conditions are met: (i) assets (or group of assets) are actively marketed for a price reasonable to the fair value at the time of sale; (ii) management has committed to a plan to sell the assets (or group of assets); (iii) the assets (or group of assets) are available for sale in current condition; and (iv) sale is probable within the next 12 months.
Impairment Of Mineral Properties
	Foreign Currency Translation
	Gains and losses resulting from foreign currency transactions denominated in currency other than the functional currency are recorded at the approximate rate of exchange at the transaction date in other expense, net. For each of the years ended December 31, 2014, 2013 and 2012, we recorded insignificant net foreign currency losses.
	Mineral Properties
	Mineral property acquisition costs, including directly related costs, are capitalized when incurred, and mineral property exploration costs are expensed as incurred.  When we determine that a mineral property can be economically developed in accordance with U.S. GAAP, the costs then incurred to develop such property will be capitalized.  Capitalized costs will be depleted using the units-of-production method over the estimated life of the proven and probable reserves.  If mineral properties are subsequently abandoned or impaired, any undepleted costs will be charged to loss in that period.
	The recoverability of the carrying values of our mineral properties is dependent upon economic reserves being discovered or developed on the properties, permitting, financing, start-up, and commercial production from, or the sale/lease of, or other strategic transactions related to these properties.  Development and/or start-up of any of these projects will depend on, among other things, management’s ability to raise additional capital for these purposes.
	We assess the carrying cost of our mineral properties for impairment whenever information or circumstances indicate the potential for impairment.  This would include events and circumstances such as our inability to obtain all the necessary permits, changes in the legal status of our mineral properties, government actions, the results of exploration activities and technical evaluations and changes in economic conditions, including the price of gold and other commodities or input prices.  Such evaluations compare estimated future net cash flows with our carrying costs and future obligations on an undiscounted basis.  If it is determined that the estimated future undiscounted cash flows are less than the carrying value of the property, a write-down to the estimated fair value will then be reported in our Consolidated Statement of Income/(Loss) for the period.  Where estimates of future net cash flows are not determinable and where other conditions indicate the potential for impairment, management uses its judgment to assess if the carrying value can be recovered and to estimate fair value.
Financial Instruments Policy
	Financial Instruments
	Accounting Standards Codification Topic 820, Fair Value Measurements and Disclosures (“ASC 820”) of the Financial Accounting Standards Board (“FASB”) requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. ASC 820 establishes a fair value hierarchy based on the level of independent, objective evidence surrounding the inputs used to measure fair value. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. ASC 820 prioritizes the inputs into three levels that may be used to measure fair value:
		·	Level 1 – Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
		·	Level 2 – Observable inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data by correlation or other means.
		·	Level 3 – Prices or valuation techniques requiring inputs that are both significant to the fair value measurement and unobservable.
	Our financial instruments include cash and cash equivalents, marketable securities, short- and long-term investments, accounts payable and certain other current assets and liabilities.  Due to the short-term nature of our cash and cash equivalents, accounts payable and certain other current assets and liabilities, we believe that their carrying amounts approximate fair value.  Our marketable securities are classified as available-for-sale. Accordingly, these securities are carried at fair value, which is based upon quoted market prices in an active market and included in Level 1 of the fair value hierarchy.   Our other investments, comprised of Midas Gold Shares, is accounted for using the fair value option based on quoted market prices in an active market and is included in Level 1 of the fair value hierarchy.
Foreign Currency Translation	Foreign Currency Translation
	Gains and losses resulting from foreign currency transactions denominated in currency other than the functional currency are recorded at the approximate rate of exchange at the transaction date in other expense, net. For each of the years ended December 31, 2014, 2013 and 2012, we recorded insignificant net foreign currency losses.
Recent accounting pronouncements	Elimination of Certain Financial Reporting Requirements, Including an Amendment to Variable Interest Entities Guidance in Topic 810, Consolidation
	In June 2014, the FASB issued guidance related to financial statement presentation for development stage enterprises. The standard removes the definition of a development stage entity from the Master Glossary of the Accounting Standards Codification, thereby removing the financial reporting distinction between development stage entities and other reporting entities from U.S. GAAP. In addition, the standard eliminates the requirements for development stage entities to (1) present inception-to-date information in the statements of income, cash flows, and shareholder equity, (2) label the financial statements as those of a development stage entity, (3) disclose a description of the development stage activities in which the entity is engaged, and (4) disclose in the first year in which the entity is no longer a development stage entity that in prior years it had been in the development stage. The standard is effective for annual reporting periods beginning after December 15, 2014, and interim periods therein, with early adoption permitted. As a result, we adopted this standard as of June 30, 2014 and eliminated since inception information from our financial statements.
	Presentation of Financial Statements - Going Concern (Subtopic 205-40)
	In August 2014, the FASB issued guidance related to financial statement presentation regarding disclosures about an entity’s ability to continue as a going concern.  The new guidance addresses management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. Management’s evaluation should be based on relevant conditions and events that are known and reasonably knowable at the date that the financial statements are issued. The standard is effective for the first interim period within annual reporting periods beginning after December 15, 2016, with early adoption permitted. We do not expect to early adopt this guidance and do not believe that the adoption of this guidance will have a material impact on our financial statements.
Warrants and Compensation Options [Member]
Warrants And Compensation Options	Warrants and Compensation Options
	Warrants and compensation options issued are recorded at grant date fair value using the Black-Scholes option pricing model.
Stock Based Compensation [Member]
Stock-Based Compensation	Stock-Based Compensation
	Under our stock option and long-term incentive plans, common share options and restricted stock units (“RSU”) may be granted to executives, employees, consultants and non-employee directors. Compensation expense for such grants is recorded in the Consolidated Statements of Income/(Loss) and Comprehensive Income/(Loss) as a component of Exploration, property evaluation and holding costs and Corporate administration, with a corresponding increase to Additional paid-in capital in the Consolidated Balance Sheets. The fair values of the options are calculated using the Black-Scholes option pricing model and forfeiture rates based on historic trends. The expense is based on the fair values of the grant on the grant date and is recognized over the vesting period specified for each grant.

Other_Investments_Tables

Other Investments (Tables)	12 Months Ended
	Dec. 31, 2014
Other Investments [Abstract]
Summary Of Financial Information For Midas
			31-Dec-13		31-Dec-12
	Total current assets	$	14,742	$	19,864
	Total non-current assets		186,673		175,957
	Total current liabilities		2,432		5,108
	Total non-current liabilities		919		380
	Total equity		198,064		190,333
			Year ended December 31,
			2013			2012
	Operating expense	$	3,908		$	7,813
	Net loss		3,796			7,180
Schedule of Summaries of Investment
				Years Ended December 31,
				2014		2013
	Fair value at beginning of period		$	20,990	$	69,489
	Sale of Midas Gold Shares, net of costs to sell			-10,560		-
	Unrealized gain/(loss) based on the fair value at the end of the period			-4,267		-48,499
	Fair value at end of period		$	6,163	$	20,990
	Estimated tax benefit/(expense) for the period		$	1,478	$	17,915
	Midas Gold shares held at the end of the period			15,802,615		31,802,615

Mineral_Properties_Tables

Mineral Properties (Tables)	12 Months Ended
	Dec. 31, 2014
Mineral Properties [Abstract]
Schedule Of Business Acquisitions By Acquisition
			At December 31, 2014		At December 31, 2013
	Mt. Todd, Australia	$	2,146	$	2,146
	Guadalupe de los Reyes, Mexico		2,224		2,752
	Los Cardones, Mexico		1,036		1,536
	Long Valley, United States		-		750
		$	5,406	$	7,184

Plant_And_Equipment_Tables

Plant And Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Plant And Equipment [Abstract]
Schedule Of Plant And Equipment
			31-Dec-14						31-Dec-13
			Cost		Accumulated depreciation		Net		Cost		Accumulated depreciation		Net
	Mt Todd, Australia	$	5,483	$	2,756	$	2,727	$	5,476	$	1,993	$	3,483
	Guadalupe de los Reyes, Mexico		17		8		9		17		5		12
	Corporate, United States		403		297		106		780		577		203
	Plant and equipment	$	5,903	$	3,061	$	2,842	$	6,273	$	2,575	$	3,698
			31-Dec-14						31-Dec-13
			Book value beginning of period		Write-downs during the period		Book value end of period		Book value beginning of period		Write-downs during the period		Book value end of period
	Assets held for sale	$	6,500	$	-	$	6,500	$	10,000	$	3,500	$	6,500

Additional_PaidIn_Capital_Tabl

Additional Paid-In Capital (Tables)	12 Months Ended
	Dec. 31, 2014
Additional Paid-In Capital [Abstract]
Schedule Of Additional Paid-In Capital
Summary Of Warrant Activity
			Warrants outstanding		Weighted average exercise price per share		Weighted average remaining life (yrs.)		Intrinsic value
	As of December 31, 2012		19,977,743	$	4.25		2.6	$	-
	As of December 31, 2013		19,977,743	$	4.63		1.6	$	-
	Expired		-4,757,941
	As of December 31, 2014		15,219,802	$	5.00		0.8	$	-
Schedule Of Compensation Options
			Compensation options outstanding			Weighted average exercise price per share		Expiry date		Weighted average remaining life (yrs.)
	As of December 31, 2012		225,000		$	3.30		Apr-13		0.3
	Exercised		-225,000
	As of December 31, 2013		-
	As of December 31, 2014		-
Summary Of The Fair Value Of All Awards issued Under Stock Compensation Plans
			Year ended December 31,
			2014		2013		2012
	Stock options	$	160	$	370	$	1,081
	Restricted stock units		966		372		3,144
		$	1,126	$	742	$	4,225
Summary Of Option Activity
			Number of options		Weighted average exercise price per option		Weighted average remaining contractual term		Aggregate intrinsic value
	Outstanding - December 31, 2012		3,102,500	$	2.80		2.68	$	637
	Granted		985,000		0.36
	Cancelled/Forfeited		-450,000		3.07
	Expired		-755,000		3.32
	Outstanding - December 31, 2013		2,882,500		1.79		3.07		54
	Granted		175,000		0.52
	Cancelled/Forfeited		-125,000		3.16
	Expired		-675,000		1.85
	Outstanding - December 31, 2014		2,257,500	$	1.60		3.02	$	-
	Exercisable - December 31, 2014		2,011,250	$	1.75		2.90	$	-
Summary Of The Status Of Unvested Stock Options
					Number of options		Weighted average grant-date fair value per option		Weighted average remaining amortization period (Years)
	Unvested - December 31, 2012				300,000	$	1.47
	Granted				985,000		0.22
	Vested				-546,250		0.90
	Unvested - December 31, 2013				738,750		0.22
	Granted				175,000		0.30
	Vested				-667,500		0.24
	Unvested - December 31, 2014				246,250	$	0.22		3.99
Summary Of Restricted Stock Units Activity
			Number of units		Weighted average grant-date fair value per RSU
	Unvested - December 31, 2012		1,994,507	$	3.50
	Cancelled		-1,133,592		2.58
	Vested		-116,875		3.51
	Granted		1,850,424		0.82
	Unvested - December 31, 2013		2,594,464		2.00
	Cancelled		-865,635		3.42
	Vested		-115,000		3.84
	Granted		2,079,000		0.46
	Unvested - December 31 , 2014		3,692,829	$	0.74

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2014
Accumulated Other Comprehensive Income [Abstract]
Reconciliation Of Amounts Contained In Accumulated Other Comprehensive Income
			Accumulated other comprehensive income/(loss)		Accumulated other comprehensive income, net of tax
	As of December 31, 2012	$	2	$	2
	Other comprehensive gain/(loss) due to change in fair market value of marketable securities during period before reclassifications		268		228
	Reclassifications due to realization of gain/(loss) on sale of marketable securities (1)		-54		-46
	Reclassifications due to write-down of marketable securities (2)		-275		-234
	As of December 31, 2013		-59		-50
	Other comprehensive gain/(loss) due to change in fair market value of marketable securities during period before reclassifications		21		18
	Reclassifications due to realization of gain/(loss) on sale of marketable securities (1)		-24		-20
	Reclassifications due to write-down of marketable securities (2)		73		62
	As of December 31, 2014	$	11	$	10
Schedule of Share Based Payments Valuation Assumptions
						Years ended December 31,
				2014			2013	2012
	Expected volatility			69.17%			72.26%	81.69%	-	83.67%
	Risk-free interest rate			1.75%			1.70%	0.77%	-	0.88%
	Expected life (years)			5			5	5
	Dividend yield			N/A			N/A	N/A
	Forfeiture rate			10%			15%	15%

Weighted_Average_Common_Shares1

Weighted Average Common Shares (Tables)	12 Months Ended
	Dec. 31, 2014
Weighted Average Common Shares [Abstract]
Weighted Average Common Shares (Table)
		At December 31,
		2014	2013
	Basic common shares	82,294,331	81,813,386
	Diluted common shares	82,294,331	81,813,386

Financial_Instruments_Tables

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Financial Instruments (Tables) [Abstract]
Financial Instruments Table
				Fair value at December 31, 2014
				Total		Level 1		Level 3
	Assets:
		Marketable securities	$	137	$	137	$	-
		Other Investments (Midas Gold Shares)		6,163		6,163		-
		Mill Equipment		6,500		-		6,500
				Fair value at December 31, 2013
				Total		Level 1		Level 3
	Assets:
		Cash equivalents	$	3,000	$	3,000	$	-
		Marketable securities		176		176		-
		Other Investments (Midas Gold Shares)		20,990		20,990		-
		Amayapampa interest (Note 7)		4,813		-		4,813
		Mill Equipment		6,500		-		6,500

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Taxes [Abstract]
Reconciliation of income taxes at statutory rates
				Years ended December 31,
				2014		2013		2012
	Income taxed at statutory rates		$	-7,314	$	-28,916	$	-34,860
	Increase (decrease) in taxes from:
		Stock-based compensation		41		13		147
		Meals and entertainment		3		9		3
		Loss related to Mexico		-		-2,632		-
		Other adjustments		-		-9		6
		Adjustment due to capital transactions		-		-60		-733
		Imputed interest		3		3		24
		Realized fx gain (loss) on intercompany balances		-		-3		-3
		Prior year provision to actual adjustments		-4,511		9,961		-40
		Differences in tax rates		541		3,451		3,905
		Effect of foreign exchange		276		-		-340
		Change in effective tax rate		-1		-407		-333
		Expiration of NOLs		189		437		70
		Change in valuation allowance		10,773		2,780		12,007
	Income tax (benefit)/expense		$	-	$	-15,373	$	-20,147
Schedule of Deferred Tax Assets and Liabilities
			December 31,
			2014		2013		2012
	Deferred income tax assets
	Excess tax basis over book basis of property, plant and equipment	$	7,893	$	7,496	$	8,001
	Marketable securities		798		661		62
	Operating loss carryforwards		35,001		36,367		37,635
	Capital loss carryforwards		10,212		5,474		2,630
	Other		2,891		1,541		3,219
	Unrealized foreign exchange on loans		-		79		217
	Total future tax assets		56,795		51,618		51,764
	Valuation allowance for future tax assets		-54,397		-43,955		-41,817
			2,398		7,663		9,947
	Deferred income tax liabilities
	Other investments		1,916		7,181		24,839
	Amayapampa disposal consideration		482		482		482
			2,398		7,663		25,321
	Total Deferred Taxes	$	-	$	-	$	-15,374
Summary of Tax Credit Carryforwards and Expirations
			Noncapital
			Canada (1)			U.S.			Mexico			Barbados		Total
	2014		$	-		$	-		$	-		$	-	$	-
	2015			-889			-			-			-2		-891
	2016			-			-			-			-1		-1
	2017			-			-			-			-6		-6
	2018			-			-			-			-20		-20
	2019			-			-			-			-42		-42
	2020			-			-			-			-20		-20
	2021			-			-			-			-31		-31
	2022			-			-			-6			-23		-29
	2023			-			-			-397			-		-397
	2024			-			-			-140			-		-140
	2025			-			-			-			-		-
	2026			-1,027			-1,166			-			-		-2,193
	2027			-847			-1,700			-			-		-2,547
	2028			-5,245			-1,719			-			-		-6,964
	2029			-4,022			-1,970			-			-		-5,992
	2030			-5,032			-1,827			-			-		-6,859
	2031			-3,806			-3,407			-			-		-7,213
	2032			-6,397			-2,323			-			-		-8,720
	2033			-9,576			-3,098			-			-		-12,674
	2034			-4,323			-								-4,323
			$	-41,164		$	-17,210		$	-543		$	-146	$	-59,062
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
				Years ended December 31,
			2014			2013			2012
	U.S.		$	-6,705		$	-49,124		$	-52,448
	Canada			-7,750			-9,540			-11,962
	Other Foreign			-4,471			-16,197			-26,393
			$	-18,926		$	-74,861		$	-90,803
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
					Years ended December 31,
				2014			2013			2012
	Deferred income tax benefit
		U.S.		$	-		$	-15,373		$	-20,147
		Canada			-			-			-
		Other Foreign			-			-			-
	Total tax benefit			$	-		$	-15,373		$	-20,147

Nature_of_Operations_Details

Nature of Operations (Details) (Midas Gold Shares [Member])	Dec. 31, 2014
Midas Gold Shares [Member]
Investment Owned, Percent of Net Assets	11.20%

Other_Investments_Narrative_De

Other Investments (Narrative) (Details)	12 Months Ended			1 Months Ended			12 Months Ended		1 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 28, 2014	Feb. 28, 2014	Apr. 30, 2011	Dec. 31, 2014	Dec. 31, 2013	Feb. 28, 2014	Apr. 30, 2011
	USD ($)	USD ($)	USD ($)	Midas Gold Corp [Member]	Midas Gold Corp [Member]	Midas Gold Corp [Member]	Midas Gold Corp [Member]	Midas Gold Corp [Member]	Midas Gold Corp [Member]	Midas Gold Corp [Member]
				USD ($)	CAD		USD ($)	USD ($)	Subsequent Event [Member]	Private Placement [Member]
									USD ($)	USD ($)
Subsidiary, Sale of Stock [Line Items]
Number of shares issued in transaction, (Shares)						30,402,615
Number of shares acquired (in shares)										1,400,000
Aggregate purchase price										$3,632
Expiration period of restrictions on the sale of shares				12 months	12 months
Common stock, shares held (in shares)							15,802,615	31,802,615	15,802,615
Proceeds from Issuance or Sale of Equity									10,560
Stock Issued During Period, Shares, New Issues				16,000,000	16,000,000
Deferred income tax benefit/(expense)		15,373	20,147
Valuation allowance	54,397	43,955	41,817
Unrealized loss on Midas Gold Shares	-4,267	-48,499	-50,363
Unrealized Gain (Loss) Based on Fair Value at the End of the Period							-4,267	-48,499
Realized gain on other investments (Note 4)	155
Sale of Stock, Price Per Share				($0.73)	0.8
Fair Value at beginning of period		21,055						20,990
Fair Value at beginning of period	21,055						20,990	69,489
Proceeds from Sale of Other Investments	10,560						10,560
Other investments (Note 4)	6,163
Fair Value at end of period	6,163
Fair Value at beginning of period
Estimated Income Tax Expense (Benefit), for the Period							1,478	17,915
Midas Gold shares held at the end of the period							15,802,615	31,802,615	15,802,615
Fair Value of Investment in Subsidiary	$6,163						$6,163	$20,990
Noncontrolling Interest, Ownership Percentage by Parent	90.00%			11.20%	11.20%

Other_Investments_Summary_Of_F

Other Investments (Summary Of Financial Information For Midas) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Total current assets	$11,362	$9,844
Total non-current assets	16,664	43,250
Total current liabilities	2,743	1,222
Total non-current liabilities		8,859
Total equity	25,283	43,013
Operating expense	-14,215	-22,149	-33,537
Net loss	-18,926	-59,488	-70,656
Midas Gold Corp [Member]
Total current assets	14,742	19,864
Total non-current assets	186,673	175,957
Total current liabilities	2,432	5,108
Total non-current liabilities	919	380
Total equity	198,064	190,333
Operating expense	3,908	7,813
Net loss	$3,796	$7,180

Mineral_Properties_Narrative_D

Mineral Properties (Narrative) (Details) (USD $)	1 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended
	Apr. 30, 2014	Jan. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2013	Dec. 31, 2015	Dec. 31, 2016
Business Acquisition [Line Items]
Payment to be made under letter of interest		$50,000
Proceeds to be received from sale of joint venture interest				-7,000
Percentage of interest sold			100.00%
ExclusivityPeriod		90 days
Payments to Acquire Interest in Joint Venture	500,000
Gain on disposal of mineral property, net					2,934,000
Write-down of mineral property			-750,000		-250,000
Write-down of mineral property			750,000		250,000
Subsequent Event [Member]
Business Acquisition [Line Items]
Proceeds to be received from sale of joint venture interest			6,000,000
Los Cardones, Mexico [Member]
Business Acquisition [Line Items]
Sale price of gold project			13,000,000
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates						7,000,000
Cangold Limited [Member]
Business Acquisition [Line Items]
Percentage of Interest in joint venture to be returned upon election not to make payment		70.00%
Cangold Limited [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Number of payments		5
Period of payment		3 years
Additional payment to acquire interest in joint venture		3,000,000
Percentage of additional interest in joint venture to be earned		30.00%
Payments to Acquire Interest in Joint Venture		5,000,000,000
Second Year [Member] | Cangold Limited [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Payments to Acquire Interest in Joint Venture							1,500,000
First Year [Member] | Cangold Limited [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Payments to Acquire Interest in Joint Venture			1,000,000
Third Year [Member] | Cangold Limited [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Payments to Acquire Interest in Joint Venture								2,500,000
Buy back Option [Member] | Cangold Limited [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Payments to Acquire Interest in Joint Venture		$5,000,000

Mineral_Properties_Schedule_Of

Mineral Properties (Schedule Of Business Acquisitions By Acquisition) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2013
Business Acquisition [Line Items]
Mineral properties net, Beginning balance	$7,184
Write-down of mineral property	-750	-250
Mineral properties net, Ending balance	5,406
Long Valley, United States [Member]
Business Acquisition [Line Items]
Mineral properties net, Beginning balance	750
Write-down of mineral property	750
Los Cardones, Mexico [Member]
Business Acquisition [Line Items]
Mineral properties net, Beginning balance			1,536
Mineral properties net, Ending balance	1,036		1,536
Guadalupe de los Reyes, Mexico [Member]
Business Acquisition [Line Items]
Mineral properties net, Beginning balance			2,752
Mineral properties net, Ending balance	2,224		2,752
Mt. Todd, Australia [Member]
Business Acquisition [Line Items]
Mineral properties net, Beginning balance			2,146
Mineral properties net, Ending balance	$2,146		$2,146

Plant_And_Equipment_Details

Plant And Equipment (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Net	$2,842	$3,698
Commissions And Other Costs To Sell Mill Equipment	800
Property, Plant, and Equipment, Salvage Value	7,300
Los Cardones, Mexico [Member]
Property, Plant and Equipment [Line Items]
Cost	17	17
Accumulated depreciation and write downs	8	5
Net	9	12
Mt. Todd, Australia [Member]
Property, Plant and Equipment [Line Items]
Cost	5,483	5,476
Accumulated depreciation and write downs	2,756	1,993
Net	2,727	3,483
Guadalupe de los Reyes, Mexico [Member]
Property, Plant and Equipment [Line Items]
Cost	403	780
Accumulated depreciation and write downs	297	577
Net	106	203
Corporate, United States [Member]
Property, Plant and Equipment [Line Items]
Cost	5,903	6,273
Accumulated depreciation and write downs	3,061	2,575
Net	$2,842	$3,698

Debt_Narrative_Details

Debt (Narrative) (Details)	1 Months Ended	3 Months Ended			12 Months Ended		1 Months Ended
	Oct. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Feb. 28, 2014
	USD ($)	USD ($)	USD ($)	CAD	USD ($)	USD ($)	Subsequent Event [Member]
							USD ($)
Short-term Bank Loans and Notes Payable				10,000,000	$9,637,000
Proceeds from Issuance of Secured Debt			-9,637,000		0	9,637,000
Debt Instrument, Interest Rate, Stated Percentage			8.00%	8.00%
Total Debt Closing Fees			3.5
Debt Issuance Cost			-99,000	100,000	99,000
Shares Issued As Debt Issuance Costs			125,798
Line of Credit Facility, Amount Outstanding							1,344,000
Shares Issued As Consideration To Lender for Extended Maturity Date Of Loan						486,382
Repayments of Debt	$2,960,000	$1,344,000			$6,344,000	$2,960,000	$5,000,000

Capital_Stock_Narrative_Detail

Capital Stock (Narrative) (Details) (USD $)	1 Months Ended					12 Months Ended
	Dec. 31, 2012	Aug. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
			item
Proceeds from issuance of common shares	$11,500,000	$265,000		$1,100,000	$733,000			$733,000
Common shares issued (in shares)		115,217		478,261	225,000
Exercises of compensation options (in shares)					225,000		225,000
Warrants Exercised		115,217
Private placement number of units sold			5,000,000
Private placement proceeds from sale of units gross			15,000,000
Private placement, number of common share in each unit			1
Private placement, number of common share purchase warrant in each unit			0.5
Private placement, warrant exercisable period			24 months
Public Offering, number of units sold	4,182,550
Over-allotment option units issued	545,550
Public Offering, number of common shares in each unit	1
Public Offering, number of common share purchase warrants in each unit	0.5
Public Offering, warrant exercisable period	24 months
Compensation Options Issued to Underwriters			166,667
Number of shares placed by brokers			3,333,334
Equity issuance commissions and other costs	$1,258,000		$770,000
Compensation options exercised, shares						125,000	450,000
Warrants [Member]
Private placement, warrant exercisable period			24 months
Private placement price per common share			$3.60
Public Offering, price per common share	3.3
Compensation Warrants [Member]
Private placement, number of common share in each unit			1
Private placement price per common share			$3.18

Additional_PaidIn_Capital_Narr

Additional Paid-In Capital (Narrative) (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	5 years	5 years	5 years
Expected volatility, Minimum	69.17%	72.26%	81.69%
Expected volatility, Maximum	69.17%	72.26%	83.67%
Risk free interest rate, Minimum	1.75%	1.70%	0.77%
Risk free interest rate, Maximum	1.75%	1.70%	0.88%
Dividend Yield	0.00%	0.00%	0.00%
Warrant Price Per Share	$5
Warrants outstanding (in shares)	15,219,802	19,977,743	19,977,743
Weighted average compensation recognition period	3 years 11 months 27 days
Stock options granted (in shares)	175,000	985,000
Forfeited, Number of units (in shares)		1,133,592
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to unvested options	$26	879
Weighted average compensation recognition period	3 years 11 months 27 days	1 year 9 months

Additional_PaidIn_Capital_Summ

Additional Paid-In Capital (Summary Of Warrant Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Additional Paid-In Capital [Abstract]
Warrants outstanding (in shares)	15,219,802	19,977,743	19,977,743
Warrants valuation	$5	$4.63	$4.25
Weighted average exercise price per share	$0.80	$1.60	$2.60
Weighted average remaining life (yrs.)	2 years 7 months	3 years 8 months	4 years 7 months

Additional_PaidIn_Capital_Sche

Additional Paid-In Capital (Schedule Of Compensation Options) (Details) (USD $)	1 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Additional Paid-In Capital [Abstract]
Compensation Options Outstanding			$225,000
Compensation options, Exercised (in shares)	-225,000	-225,000
Compensation options, Weighted average exercise price per share (in dollars per share)			$3.30
Expiry date			1-Apr-13
Compensation options, Weighted average remaining life (yrs.)			3 months 18 days

Additional_PaidIn_Capital_Summ1

Additional Paid-In Capital (Summary Of the Fair Value Of All Awards issued Under Stock Compensation Plans) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Additional Paid-In Capital [Abstract]
Stock options	$160	$370	$1,081
Restricted stock units	966	372	3,144
Share-based compensation	$1,126	$742	$4,225

Additional_PaidIn_Capital_Summ2

Additional Paid-In Capital (Summary Of Option Activity) (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Additional Paid-In Capital [Abstract]
Number of options, Outstanding	2,257,500	2,882,500	3,102,500
Granted, Number of options (in shares)	175,000	985,000
Number of options, Exercised (in shares)	-125,000	-450,000
Number of options, Expired or Forfeited (in shares)	-675,000	-755,000
Number of options, Exercisable (in shares)	2,011,250
Weighted average exercise price per share, Outstanding (in dollars per share)	$1.60	$1.79	$2.80
Weighted average exercise price per option, Granted (in dollars per share)	$0.52	$0.36
Weighted average exercise price per option, Exercised (in dollars per share)	$3.16	$3.07
Weighted average exercise price per option, Expired for forfeited (in dollars per share)	$1.85	$3.32
Weighted average exercise price per share, Exercisable (in dollars per share)	$1.75
Weighted average remaining contractual term, Outstanding	3 years 7 days	3 years 26 days	2 years 8 months 5 days
Weighted average remaining contractual term, Exercisable	2 years 10 months 24 days
Aggregate intrinsic value, Outstanding		$54	$637

Additional_PaidIn_Capital_Summ3

Additional Paid-In Capital (Summary Of The Status Of Unvested Stock Options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Additional Paid-In Capital [Abstract]
Unvested, Number of options (in shares)	246,250	738,750	300,000
Granted, Number of options (in shares)	175,000	985,000
Vested, Number of options (in shares)	-667,500	-546,250
Unvested, Weighted average grant-date fair value per option (in dollars per share)	$0.22	$0.22	$1.47
Granted, Weighted average grant-date fair value per option (in dollars per share)	$0.30	$0.22
Vested, weighted average grant-date fair value per option (in dollars per share)	($0.24)	($0.90)
Weighted average remaining amortization period	3 years 11 months 27 days

Additional_PaidIn_Capital_Summ4

Additional Paid-In Capital (Summary Of Restricted Stock Units Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Additional Paid-In Capital [Abstract]
Unvested, Number of units (in shares)	3,692,829	2,594,464	1,994,507
Forfeited, Number of units (in shares)		-1,133,592
Granted, Number of units (in shares)	2,079,000	1,850,424
Vested, Number of units (in shares)	-115,000
Cancelled, Number of units (in shares)	-865,635
Unvested, Weighted average fair value (in dollars per share)	$0.74	$2	$3.50
Forfeited, Weighted average fair value (in dollars per share)	$3.42	$2.58
Cancelled, Weighted average fair value (in dollars per share)	$3.42	$2.58
Granted, Weighted average fair value (in dollars per share)	$0.46	$0.82
Vested, Weighted average fair value (in dollars per share)	$3.84

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income/(Loss) (Reconciliation Of Amounts Contained In Accumulated Other Comprehensive Income) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Accumulated other comprehensive income
Beginning of period	($59)		$2
Decreases to fair market value during period	21	[1]	268
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	-24	[2]	-54	[1]
Reclassifications Due To Write Down Of Marketable Securities	73		-275
End of period	11		-59
Accumulated other comprehensive income, net of tax
Beginning of period	-50		2
Decreases to fair market value during period	18	[1]	228
Decreases due to realization of a gain	-24	[2]	-54	[1]
Accumulated other comprehensive income, net of tax due to change in fair market value	-20	[2]	-46	[1]
Reclassifications Due To Write Down Of Marketable Securities Accumulated Other Comprehensive Income Net Of Tax	62		-234
End of period	$10		($50)
[1]	Reclassified to gain/(loss) on sale of marketable securities on the Consolidated Statement of Income/(Loss) and Comprehensive Income/(Loss).
[2]	Reclassified to write-down of marketable securities on the Consolidated Statement of Income/(Loss) and Comprehensive Income/(Loss).

Weighted_Average_Common_Shares2

Weighted Average Common Shares (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Basic Common Shares	82,294,331	81,813,386	74,351,065
Weighted Average Number of Shares Outstanding, Diluted, Total	82,294,331	81,813,386	74,351,065
Class of Warrant or Right, Outstanding	15,219,802	19,977,743	19,977,743
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	2,257,500	2,882,500	3,102,500
Warrants [Member]
Class of Warrant or Right, Outstanding	15,219,802	19,977,743
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	2,257,500	2,882,500

Commitments_and_Contingencies_

Commitments and Contingencies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies [Abstract]
Percentage of participating interest in gold project by affilitate	10.00%
Cash payment to affiliate as percentage of value of annual gold production from current mining leases	1.00%
Percentage of royalty on other metals	1.00%
Noncontrolling Interest, Ownership Percentage by Parent	90.00%

Fair_Value_Of_Financial_Instru

Fair Value Of Financial Instruments (Narrative) (Details)	Dec. 31, 2014
Financial Instruments [Abstract]
Level 3 percentage of fair value assets	51.00%

Fair_Value_Of_Financial_Instru1

Fair Value Of Financial Instruments (Assets Measured At Fair Value By Level Within The Fair Value Hierarchy) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Cash Equivalents		$3,000
Marketable securities	137	176
Other Investments (Midas Gold shares)	6,163
Long Term Investments (Midas Gold shares)	6,163
Amayapampa interest (Note 7)	20,990	4,813
Mill Equipment	6,500	6,500
Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Cash Equivalents		3,000
Marketable securities	137	176
Long Term Investments (Midas Gold shares)	6,163
Amayapampa interest (Note 7)	20,990
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Mill Equipment	$6,500	$6,500

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information and Material Non-Cash Transactions (Details) (USD $)	1 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Jul. 31, 2012	Dec. 31, 2014
Compensation Options Issued to Underwriters	166,667
Gold Production Volume Second Tier For Royalty Calculation		$1,250
Royalty Percentage On Second Tier Volume Production		2.50%
Gold Production Volume First Tier For Royalty Calculation		$1,250
Royalty Percentage On First Tier Volume Production		2.00%
Percentage Of Ownership Under Purchase Agreement		100.00%
Two Thousand Thirteen Facility [Member]
Number of shares issued in transaction, (Shares)		612,180
Compensation Warrants [Member]
Warrants issued (in shares)	166,667

Income_Tax_Narrative_Details

Income Tax (Narrative) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred income tax benefit/(expense)		$15,373	$20,147
Deferred Tax Assets, Valuation Allowance	54,397	43,955	41,817
Valuation allowance for future tax assets	-54,397	-43,955	-41,817
Operating Loss Carryforwards	59,062
Non-deductible share issuance expense	18,628
Australia [Member]
Operating Loss Carryforwards	67,064
Capital Loss Canada [Member]
Operating Loss Carryforwards	$36,524

Income_Tax_Deferred_Tax_Expens

Income Tax (Deferred Tax Expense) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred Income Tax Expense (Benefit), Total		($15,373)	($20,147)
U.S.
Deferred Federal Income Tax Expense (Benefit)		-15,373	-20,147
Foreign Tax Authority [Member]
Deferred Foreign Income Tax Expense (Benefit)
Canada [Member]
Deferred Foreign Income Tax Expense (Benefit)

Income_Tax_Sources_of_Income_D

Income Tax (Sources of Income) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest, Total	($18,926)	($74,861)	($90,803)
U.S.
Federal Income Tax Expense (Benefit), Continuing Operations	-6,705	-49,124	-52,448
Foreign Tax Authority [Member]
Foreign Income Tax Expense (Benefit), Continuing Operations	-4,471	-16,197	-26,393
Canada [Member]
Foreign Income Tax Expense (Benefit), Continuing Operations	($7,750)	($9,540)	($11,962)

Income_Tax_Rate_Reconciliation

Income Tax (Rate Reconciliation) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income taxed at statutory rates	($7,314)	($28,916)	($34,860)
Stock-based compensation	41	13	147
Meals and entertainment	3	9	3
Loss related to Mexico		-2,632
Other adjustments		-9	6
Adjustments due to capital transactions		-60	-733
Imputed Interest	3	3	24
Realized fx gain (loss) on intercompany balances		-3	-3
Prior year provision to actual adjustments	-4,511	9,961	-40
Differences in tax rates	541	3,451	3,905
Effect of foreign exchange	276		-340
Change in effective tax rate	-1	-407	-333
Expiration of NOLs	189	437	70
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	10,773	2,780	12,007
Deferred Income Tax Expense (Benefit), Total		($15,373)	($20,147)

Income_Tax_Deferred_Tax_Assets

Income Tax (Deferred Tax Assets/Liabilities) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Components of Deferred Tax Assets and Liabilities [Abstract]
Excess tax basis over book basis of property, plant, and equipment	$7,893	$7,496	$8,001
Deferred Tax Assets, Marketable securities	798	661	62
Operating loss carryforwards	35,001	36,367	37,635
Capital loss carryforwards	10,212	5,474	2,630
Other	2,891	1,541	3,219
Unrealized foreign exchange on loans		79	217
Deferred Tax Assets, Gross, Total	56,795	51,618	51,764
Valuation allowance for future tax assets	-54,397	-43,955	-41,817
Deferred Tax Assets, Net	2,398	7,663	9,947
Other investments	1,916	7,181	24,839
Amayapampa disposal consideration	482	482	482
Deferred Income Tax Liabilities, Gross	2,398	7,663	25,321
Total Deferred Taxes			($15,374)

Income_Tax_Operating_Loss_Carr

Income Tax (Operating Loss Carryforward Expirations) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Operating Loss Carryforwards	59,062
U.S.
Operating Loss Carryforwards	17,210
Noncapital Canada [Member]
Operating Loss Carryforwards	41,164	[1]
Mexico [Member]
Operating Loss Carryforwards	543
Barbados [Member]
Operating Loss Carryforwards	146
Tax Year 2014 [Member]
Operating Loss Carryforwards, Expiration Date	31-Dec-14
Tax Year 2015 [Member]
Operating Loss Carryforwards	891
Operating Loss Carryforwards, Expiration Date	31-Dec-15
Tax Year 2015 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	889	[1]
Tax Year 2015 [Member] | Barbados [Member]
Operating Loss Carryforwards	2
Tax Year 2016 [Member]
Operating Loss Carryforwards	1
Operating Loss Carryforwards, Expiration Date	31-Dec-16
Tax Year 2016 [Member] | Barbados [Member]
Operating Loss Carryforwards	1
Tax Year 2017 [Member]
Operating Loss Carryforwards	6
Operating Loss Carryforwards, Expiration Date	31-Dec-17
Tax Year 2017 [Member] | Barbados [Member]
Operating Loss Carryforwards	6
Tax Year 2018 [Member]
Operating Loss Carryforwards	20
Operating Loss Carryforwards, Expiration Date	31-Dec-18
Tax Year 2018 [Member] | Barbados [Member]
Operating Loss Carryforwards	20
Tax Year 2019 [Member]
Operating Loss Carryforwards	42
Operating Loss Carryforwards, Expiration Date	31-Dec-19
Tax Year 2019 [Member] | Barbados [Member]
Operating Loss Carryforwards	42
Tax Year 2020 [Member]
Operating Loss Carryforwards	20
Operating Loss Carryforwards, Expiration Date	31-Dec-20
Tax Year 2020 [Member] | Barbados [Member]
Operating Loss Carryforwards	20
Tax Year 2021 [Member]
Operating Loss Carryforwards	31
Operating Loss Carryforwards, Expiration Date	31-Dec-21
Tax Year 2021 [Member] | Barbados [Member]
Operating Loss Carryforwards	31
Tax Year 2022 [Member]
Operating Loss Carryforwards	29
Operating Loss Carryforwards, Expiration Date	31-Dec-22
Tax Year 2022 [Member] | Mexico [Member]
Operating Loss Carryforwards	6
Tax Year 2022 [Member] | Barbados [Member]
Operating Loss Carryforwards	23
Tax Year 2023 [Member]
Operating Loss Carryforwards	397
Operating Loss Carryforwards, Expiration Date	31-Dec-23
Tax Year 2023 [Member] | Mexico [Member]
Operating Loss Carryforwards	397
Tax Year 2024 [Member]
Operating Loss Carryforwards	140
Operating Loss Carryforwards, Expiration Date	31-Dec-24
Tax Year 2024 [Member] | Mexico [Member]
Operating Loss Carryforwards	140
Tax Year 2025 [Member]
Operating Loss Carryforwards, Expiration Date	31-Dec-25
Tax Year 2026 [Member]
Operating Loss Carryforwards	2,193
Operating Loss Carryforwards, Expiration Date	31-Dec-26
Tax Year 2026 [Member] | U.S.
Operating Loss Carryforwards	1,166
Tax Year 2026 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	1,027	[1]
Tax Year 2027 [Member]
Operating Loss Carryforwards	2,547
Operating Loss Carryforwards, Expiration Date	31-Dec-27
Tax Year 2027 [Member] | U.S.
Operating Loss Carryforwards	1,700
Tax Year 2027 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	847	[1]
Tax Year 2028 [Member]
Operating Loss Carryforwards	6,964
Operating Loss Carryforwards, Expiration Date	31-Dec-28
Tax Year 2028 [Member] | U.S.
Operating Loss Carryforwards	1,719
Tax Year 2028 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	5,245	[1]
Tax Year 2029 [Member]
Operating Loss Carryforwards	5,992
Operating Loss Carryforwards, Expiration Date	31-Dec-29
Tax Year 2029 [Member] | U.S.
Operating Loss Carryforwards	1,970
Tax Year 2029 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	4,022	[1]
Tax Year 2030 [Member]
Operating Loss Carryforwards	6,859
Operating Loss Carryforwards, Expiration Date	31-Dec-30
Tax Year 2030 [Member] | U.S.
Operating Loss Carryforwards	1,827
Tax Year 2030 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	5,032	[1]
Tax Year 2031 [Member]
Operating Loss Carryforwards	7,213
Operating Loss Carryforwards, Expiration Date	31-Dec-31
Tax Year 2031 [Member] | U.S.
Operating Loss Carryforwards	3,407
Tax Year 2031 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	3,806	[1]
Tax Year 2032 [Member]
Operating Loss Carryforwards	8,720
Operating Loss Carryforwards, Expiration Date	31-Dec-32
Tax Year 2032 [Member] | U.S.
Operating Loss Carryforwards	2,323
Tax Year 2032 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	6,397	[1]
Tax Year 2033 [Member]
Operating Loss Carryforwards	12,674
Operating Loss Carryforwards, Expiration Date	31-Dec-33
Tax Year 2033 [Member] | U.S.
Operating Loss Carryforwards	3,098
Tax Year 2033 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	9,576	[1]
Tax Year 2034 [Member]
Operating Loss Carryforwards	4,323
Operating Loss Carryforwards, Expiration Date	31-Dec-34
Tax Year 2034 [Member] | Noncapital Canada [Member]
Operating Loss Carryforwards	4,323	[1]
[1]	Canadian capital loss carryforwards of $36,524 and Australian NOLs of $67,064, which do not expire and are therefore not included above.

Related_Party_Transaction_Narr

Related Party Transaction (Narrative) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Number of Reportable Segments	1
Reportable Subsegments [Member]
Revenues	$0	$0	$0

Related_Party_Transactions_Nar

Related Party Transactions (Narrative) (Details) (Sierra Partners LLC [Member], USD $)	0 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Sierra Partners LLC [Member]
Related Party Transaction [Line Items]
Monthly retainer fee	$10
Payments to related party		$80	$120

Subsequent_Event_Narrative_Det

Subsequent Event (Narrative) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Subsequent Events [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	2,079,000	1,850,424