Vista Gold (VGZ) 10-Q29 Jul 202020 Q2 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2020	Jul. 20, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2020
Entity File Number	001-9025
Entity Registrant Name	VISTA GOLD CORP.
Entity Incorporation, State or Country Code	A1
Entity Tax Identification Number	98-0542444
Entity Address, Address Line One	7961 Shaffer Parkway, Suite 5
Entity Address, City or Town	Littleton
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80127
City Area Code	720
Local Phone Number	981-1185
Title of 12(b) Security	Common Shares
Trading Symbol	VGZ
Security Exchange Name	NYSEAMER
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		102,096,256
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000783324
Amendment Flag	false

UNAUDITED CONDENSED CONSOLIDATE

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 2,209	$ 1,408
Short-term investments (Note 3)	3,294	3,260
Other investments, at fair value (Note 3)	2,692	3,676
Other current assets	315	482
Total current assets	8,510	8,826
Non-current assets:
Mineral properties (Note 4)	2,146	2,146
Plant and equipment, net (Note 5)	5,600	5,623
Right-of-use assets	40	89
Total non-current assets	7,786	7,858
Total assets	16,296	16,684
Current liabilities:
Accounts payable	54	190
Accrued liabilities and other	650	640
Deferred option gain (Note 4)	2,960
Provision for environmental liability (Note 7)		240
Total current liabilities	3,664	1,070
Non-current liabilities:
Deferred option gain (Note 4)		2,960
Provision for environmental liability (Note 7)	240
Lease liability	5	8
Total non-current liabilities	245	2,968
Total liabilities	3,909	4,038
Commitments and contingencies - (Note 8)
Shareholders' equity:
Common shares, no par value - unlimited shares authorized; shares outstanding: 2020 - 102,096,256 and 2019 - 100,698,124 (Note 6)	459,055	457,716
Accumulated deficit	(446,668)	(445,070)
Total shareholders' equity	12,387	12,646
Total liabilities and shareholders' equity	$ 16,296	$ 16,684

UNAUDITED CONSOLIDATED BALANCE

UNAUDITED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Shareholders' equity:
Common Shares, par value	$ 0	$ 0
Common Stock, Shares Authorized, Unlimited [Fixed List]	Unlimited	Unlimited
Common shares outstanding	102,096,256	100,698,124

UNAUDITED CONSOLIDATED STATEMEN

UNAUDITED CONSOLIDATED STATEMENTS OF INCOME/(LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating income/(expense:):
Gain on disposal of mineral property interests, net (Note 4)	$ 2,568		$ 2,568
Exploration, property evaluation and holding costs	(960)	$ (947)	(1,908)	$ (1,893)
Corporate administration	(877)	(1,067)	(2,253)	(2,214)
Depreciation and amortization	(11)	(14)	(23)	(26)
Total operating income/(expense)	720	(2,028)	(1,616)	(4,133)
Non-operating income/(expense):
Gain (loss) on other investments (Note 3)	1,099	(1,093)	(30)	(1,717)
Interest income	4	34	14	76
Other income	79	43	34	78
Total non-operating income/(expense)	1,182	(1,016)	18	(1,563)
Income/(loss) before income taxes	1,902	(3,044)	(1,598)	(5,696)
Net income/(loss)	$ 1,902	$ (3,044)	$ (1,598)	$ (5,696)
Basic:
Weighted average number of shares outstanding (in shares)	101,372,460	100,537,541	101,035,292	100,431,813
Net income/(loss) per share (Note 6), Basic (in dollars per share)	$ 0.01	$ (0.03)	$ (0.02)	$ (0.06)
Diluted:
Weighted average number of shares outstanding (in shares)	103,863,384	100,537,541	101,035,292	100,431,813
Net income/(loss) per share, Diluted (in dollars per share)	$ 0.02	$ (0.03)	$ (0.02)	$ (0.06)

UNAUDITED CONSOLIDATED STATEM_2

UNAUDITED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Accumulated Deficit [Member]	Total
Balances, beginning of period at Dec. 31, 2018	$ 456,938	$ (435,684)	$ 21,254
Balances, beginning of period (in shares) at Dec. 31, 2018	100,268,161
Shares issued (RSUs vested, net of shares withheld) (Note 6)	$ (46)		(46)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares)	142,380
Shares issued (exercise of stock options)	$ 66		66
Shares issued (exercise of stock options) (in shares)	127,000
Stock-based compensation (Note 6)	$ 467		467
Net income/(loss)		(5,696)	(5,696)
Balances, end of period at Jun. 30, 2019	$ 457,425	(441,380)	16,045
Balances, end of period (in shares) at Jun. 30, 2019	100,537,541
Balances, beginning of period at Dec. 31, 2018	$ 456,938	(435,684)	$ 21,254
Balances, beginning of period (in shares) at Dec. 31, 2018	100,268,161
Shares issued (exercise of stock options) (in shares)			163,667
Balances, end of period at Dec. 31, 2019	$ 457,716	(445,070)	$ 12,646
Balances, end of period (in shares) at Dec. 31, 2019	100,698,124
Balances, beginning of period at Mar. 31, 2019	$ 457,009	(438,336)	18,673
Balances, beginning of period (in shares) at Mar. 31, 2019	100,537,541
Stock-based compensation (Note 6)	$ 416		416
Net income/(loss)		(3,044)	(3,044)
Balances, end of period at Jun. 30, 2019	$ 457,425	(441,380)	16,045
Balances, end of period (in shares) at Jun. 30, 2019	100,537,541
Balances, beginning of period at Dec. 31, 2019	$ 457,716	(445,070)	12,646
Balances, beginning of period (in shares) at Dec. 31, 2019	100,698,124
Shares issued, net of offering costs (Note 6)	$ 807		807
Shares issued, net of offering costs (Note 6) (in shares)	1,031,819
Shares issued (RSUs vested, net of shares withheld) (Note 6)	$ (97)		(97)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares)	316,313
Shares issued (exercise of stock options)	$ 37		$ 37
Shares issued (exercise of stock options) (in shares)	50,000		50,000
Stock-based compensation (Note 6)	$ 592		$ 592
Net income/(loss)		(1,598)	(1,598)
Balances, end of period at Jun. 30, 2020	$ 459,055	(446,668)	12,387
Balances, end of period (in shares) at Jun. 30, 2020	102,096,256
Balances, beginning of period at Mar. 31, 2020	$ 458,106	(448,570)	9,536
Balances, beginning of period (in shares) at Mar. 31, 2020	100,698,124
Shares issued, net of offering costs (Note 6)	$ 807		807
Shares issued, net of offering costs (Note 6) (in shares)	1,031,819
Shares issued (RSUs vested, net of shares withheld) (Note 6)	$ (97)		(97)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares)	316,313
Shares issued (exercise of stock options)	$ 37		37
Shares issued (exercise of stock options) (in shares)	50,000
Stock-based compensation (Note 6)	$ 202		202
Net income/(loss)		1,902	1,902
Balances, end of period at Jun. 30, 2020	$ 459,055	$ (446,668)	$ 12,387
Balances, end of period (in shares) at Jun. 30, 2020	102,096,256

UNAUDITED CONSOLIDATED STATEM_3

UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net loss		$ (1,598)	$ (5,696)
Adjustments to reconcile net loss for the period to net cash used in operations:
Depreciation and amortization	$ 11	23	26
Stock-based compensation		592	467
Gain on disposal of mineral property	(2,568)	(2,568)
Loss on other investments	(1,099)	30	1,717
Change in working capital account items:
Other current assets		167	89
Provision for environmental liability			(2)
Accounts payable, accrued liabilities and other		88	8
Net cash used in operating activities		(3,266)	(3,391)
Cash flows from investing activities:
Proceeds from sales of marketable securities		954
Disposition (acquisitions) of short-term investments, net		(34)	1,988
Additions to plant and equipment			(40)
Proceeds from option/sale agreements, net		2,400	1,667
Net cash provided by investing activities		3,320	3,615
Cash flows from financing activities:
Proceeds from equity financings, net		807
Payment of taxes from withheld shares		(97)	(46)
Proceeds from exercise of stock options		37	66
Net cash provided by financing activities		747	20
Net increase in cash and cash equivalents		801	244
Cash and cash equivalents, beginning of period		1,408	1,071
Cash and cash equivalents, end of period	$ 2,209	$ 2,209	$ 1,315

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	6 Months Ended
Nature of Operations and Basis of Presentation	Jun. 30, 2020
Nature of Operations and Basis of Presentation
Nature of Operations and Basis of Presentation	VISTA GOLD CORP. NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Dollar amounts in U.S. dollars and in thousands, except share amounts and per ounce amounts) 1. Nature of Operations and Basis of Presentation Vista Gold Corp. and its subsidiaries (collectively, “Vista,” the “Company,” “we,” “our,” or “us”) operate in the gold mining industry. We are focused on 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. We do not currently generate cash flows from mining operations. The Company’s flagship asset is its 100% owned Mt Todd gold project (“Mt Todd” or the “Project”) in Northern Territory, Australia. Mt Todd is the largest undeveloped gold project in Australia and, if developed as presently designed, is projected to produce an estimated 5.3 million ounces of gold from proven and probable reserves over a 13-year mine life. Since acquiring Mt Todd in 2006, we have invested substantial financial resources to systematically explore, evaluate, engineer, permit and de-risk the Project. We believe these efforts have increased the total gold resources and reserves, added substantially to the underlying value of the Project, and demonstrated strong development potential. In September 2019, Vista announced the positive results of an updated preliminary feasibility study (the “2019 PFS”) for Mt Todd. The improvements reflected in the 2019 PFS included increased estimated gold recovery and production. The Mt Todd mine operated previously and the 2019 PFS contemplates utilizing certain existing infrastructure from that operation, which we expect to considerably reduce the Project’s estimated development costs. Vista also holds a number of non-core assets. As of June 30, 2020, the Company held 4.7 million common shares of Midas Gold Corp. (“Midas Gold Shares”), a non-core project in Mexico subject to a third-party option agreement, royalty interests in the United States and Indonesia, mill equipment not in use and listed for sale, and miscellaneous holdings of third-party equity securities. The interim Condensed Consolidated Financial Statements (“interim statements”) of the Company are unaudited. In the opinion of management, all adjustments and disclosures necessary for a fair presentation of these interim statements have been included. The results reported in these interim statements are not necessarily indicative of the results that may be reported for the entire year. These interim statements should be read in conjunction with the Company’s Consolidated Financial Statements for the year ended December 31, 2019 as filed with the United States Securities and Exchange Commission and Canadian securities regulatory authorities on Form 10-K (the “2019 Financial Statements”). The year-end balance sheet data was derived from audited financial statements and, in accordance with the instructions to Form 10-Q, certain information and footnote disclosures required by United States generally accepted accounting principles have been condensed or omitted. References to $ are to United States dollars and A$ are to Australian dollars.

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
Significant Accounting Policies	Jun. 30, 2020
Significant Accounting Policies
Significant Accounting Policies	2. Significant Accounting Policies Significant accounting policies are included in the 2019 Financial Statements.

Short-term and Other Investment

Short-term and Other Investments	6 Months Ended
Short-term and Other Investments	Jun. 30, 2020
Short-term and Other Investments
Short-term and Other Investments	3. Short-term and Other Investments Short-term investments As of June 30, 2020, and December 31, 2019, the amortized cost basis of our short-term investments was $3,294 and $3,260, respectively, which approximates fair value. Short-term investments at June 30, 2020 and December 31, 2019 were comprised of U.S. and Australian government treasury securities and certificates of deposit, all of which had maturity dates on the date of purchase greater than 90 days but less than one year. Investments with maturity dates of 90 days or less are included in cash and cash equivalents. Other investments The Company’s investments in Midas Gold Shares and Nusantara Resources Limited shares (“Nusantara Shares”) were recorded at fair value in the Condensed Consolidated Balance Sheets. Subsequent changes in fair value were recorded in the Condensed Consolidated Statements of Comprehensive Income/(Loss) in the period in which they occurred. As of June 30, 2020, and December 31, 2019, the Company held 4,667,615 and 6,882,115 Midas Gold Shares, respectively. The Company also held 1,333,334 Nusantara Shares as of June 30, 2020 and December 31, 2019. The fair value of other investments was $2,692 and $3,676 as of June 30, 2020 and December 31, 2019, respectively. During the three months ended June 30, 2020, the Company sold 1,572,500 Midas Gold Shares for net proceeds of $654, at a gain of $135 based on the most recent measurement period of March 31, 2020. During the six months ended June 30, 2020, the Company sold 2,214,500 Midas Gold Shares for net proceeds of $954, at a gain of $120 based on the most recent measurement periods of March 31, 2020 and December 31, 2019. Cumulative realized loss since acquisition of these Midas Gold Shares in April 2011 was $4,730, of which $4,850 was recognized in previous periods as unrealized loss, net. No Midas Gold Shares were sold during the three and six months ended June 30, 2019.

Mineral Properties

Mineral Properties	6 Months Ended
Mineral Properties	Jun. 30, 2020
Mineral Properties
Mineral Properties	4. Mineral Properties Mt Todd, Northern Territory, Australia The capitalized mineral property values are as follows: At June 30, 2020 At December 31, 2019 Mt Todd, Australia $ 2,146 $ 2,146 Vista acquired Mt Todd in March 2006. The transaction-related costs of $2,146 were capitalized as mineral properties. This amount included the purchase price, costs associated with related commitments, and transaction costs. Since 2006, the Company has systematically advanced the project through exploration, metallurgical testing, engineering, and site management activities. Costs associated with these activities were charged to expense as incurred. See Note 8 for other commitments to the Jawoyn Association Aboriginal Corporation (the “JAAC”). Guadalupe de Los Reyes, Sinaloa, Mexico As of June 30, 2020, the Company held the Guadalupe de los Reyes gold and silver project in Sinaloa, Mexico (“Los Reyes”), which was subject to an agreement with Prime Mining Corporation (“Prime Mining”). In June 2020, the Company amended the agreement to accelerate Prime Mining’s final $1,500 payment required to complete the purchase of Los Reyes and to require additional payments of $2,100 by Prime Mining in lieu of Vista being granted certain royalty and back-in rights, with $1,100 due in January 2021 and $1,000 due in July 2021. The previous $4,500 paid to date was applied first to reduce our carrying value to zero, with the remaining $2,892 recorded as a deferred option gain. The Company received the final $1,500 purchase price payment in July 2020 and transferred control of the Los Reyes project to Prime Mining. With transfer of control, Vista will recognize the $2,892 deferred option gain as income during the three months ending September 30, 2020. Awak Mas, Sulawesi, Indonesia Vista holds a net smelter return royalty (“NSR”) on the Awak Mas project in Indonesia. During 2019, Vista and the holder of Awak Mas amended the original royalty agreement to allow the holder or a nominated party to make a $2,400 payment to Vista by April 30, 2020 to cancel a 1% NSR on the first 1,250,000 ounces produced at Awak Mas and a 1.25% NSR on the next 1,250,000 ounces produced. On May 5, 2020, the Company received $2,400 to cancel the related 1% NSR and 1.25% NSR. The gain recognized upon receipt of this payment was $2,568, which included the $2,400 payment plus $168 of previously deferred option gain. The holder of Awak Mas or a nominated party now has the right to cancel the remaining 1% NSR and 1.25% NSR for an additional payment of $2,500 by April 30, 2021, at which time the Company will recognize a gain for this amount and $68 that is currently carried as deferred option gain. If the holder does not make this final payment by April 30, 2021, Vista will retain the remaining royalty interests.

Plant And Equipment

Plant And Equipment	6 Months Ended
Plant And Equipment	Jun. 30, 2020
Plant and Equipment
Plant And Equipment	5. Plant and Equipment June 30, 2020 December 31, 2019 Accumulated Accumulated Cost depreciation Net Cost depreciation Net Mt Todd, Australia $ 5,237 $ 5,137 $ 100 $ 5,237 $ 5,114 $ 123 Corporate, United States 333 333 — 333 333 — Used mill equipment, Canada 5,500 — 5,500 5,500 — 5,500 $ 11,070 $ 5,470 $ 5,600 $ 11,070 $ 5,447 $ 5,623

Common Shares

Common Shares	6 Months Ended
Common Shares	Jun. 30, 2020
Common Shares
Common Shares	6. Common Shares Equity Financing Vista previously entered into an at-the-market offering agreement (the “ATM Agreement”) with H. C. Wainwright & Co., LLC (“Wainwright”), under which the Company may, but is not obligated to, issue and sell common shares of the Company (“Common Shares”) through Wainwright for aggregate sales proceeds of up to $10,000 (the “ATM Program”). No securities will be offered in Canada under the ATM Agreement. The ATM Agreement was amended in June 2020 to remain in force until terminated by either party. During the three months ended June 30, 2020 the Company sold 1,031,819 Common Shares under the ATM Program for net proceeds of $807. No offers or sales were made under the ATM Program during the six months ended June 30, 2019. Each sale under the ATM Agreement was made pursuant to an “at the market offering” as defined in Rule 415 under the United States Securities Act of 1933, as amended. Warrants All outstanding warrants totaling 6,514,625 expired unexercised in August 2019. Stock-Based Compensation The Company’s stock-based compensation plans include: restricted share units (“RSUs”) currently outstanding under the Company’s long term equity incentive plan (“LTIP”), deferred share units (“DSUs”) issuable pursuant to the Company’s deferred share unit plan (“DSU Plan”) and stock options (“Stock Options”) issuable under the Company’s stock option plan (the “Plan”). Stock-based compensation may be issued to our directors, officers, employees and consultants. The maximum number of Common Shares that may be reserved for issuance under these stock-based compensation plans is a variable number equal to 10% of the issued and outstanding Common Shares on a non-diluted basis at any one time. Vista also issued phantom units in 2018 to be settled in cash over a three-year term. Stock-based compensation and phantom units may be granted from time to time at the discretion of the Board of Directors of the Company (the “Board”), with vesting provisions as determined by the Board. Stock-based compensation expense for the three and six months ended June 30, 2020 and 2019 was: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Restricted share units $ 180 $ 126 $ 331 $ 127 Deferred share units — 209 209 209 Stock Options 22 81 52 131 $ 202 $ 416 $ 592 $ 467 Phantom units $ 35 $ 22 $ 34 $ 44 As of June 30, 2020, unrecognized compensation expense for RSUs, Stock Options, and phantom units was $622, $12, and $60, respectively, which is expected to be recognized over weighted average periods of 1.3, 0.6, and 0.5 years, respectively. Restricted Share Units The following table summarizes RSU activity: Weighted average Number grant-date fair of RSUs value per RSU Unvested - December 31, 2018 1,002,670 $ 0.78 Granted 1,412,500 0.49 Cancelled/forfeited (657,573) 0.76 Vested, net of shares withheld (266,296) 0.84 Unvested - December 31, 2019 1,491,301 $ 0.51 Granted 1,609,000 0.41 Cancelled/forfeited (211,019) 0.57 Vested, net of shares withheld (316,313) 0.57 Unvested - June 30, 2020 2,572,969 $ 0.43 During the six months ended June 30, 2020 and 2019, the Company withheld Common Shares with an equivalent value to meet employee withholding tax obligations of $97 and $46, respectively, that resulted upon vesting of RSUs during the period. Common Shares withheld are considered cancelled/forfeited. Deferred Share Units The DSU Plan provides for granting of DSUs to non-employee directors. DSUs vest immediately, however the Company will issue one Common Share for each DSU only after the non-employee director has ceased to be a director of the Company. In March 2020, the Board granted 360,000 DSUs and the Company recognized $209 in DSU expense. In May 2019, the Board granted 366,000 DSUs and the Company recognized $209 in DSU expense. The following table summarizes DSU activity: Weighted average Number of grant-date fair DSUs value per DSU Unvested - December 31, 2018 — — Granted 366,000 0.57 Outstanding - December 31, 2019 366,000 0.57 Granted 360,000 0.58 Outstanding - June 30, 2020 726,000 0.57 Stock Options The following table summarizes option activity: Weighted average Weighted average remaining Aggregate Number of exercise price contractual term intrinsic options per option (years) value Outstanding - December 31, 2018 1,319,149 0.71 3.84 $ 1 Granted 350,000 0.73 Exercised (163,667) 0.54 33 Cancelled/Forfeited (16,667) 0.75 — Expired (51,815) 0.70 2 Outstanding - December 31, 2019 1,437,000 $ 0.73 3.49 $ 35 Granted 50,000 0.51 Exercised (50,000) 0.75 9 Cancelled/Forfeited (70,000) 1.02 — Outstanding - June 30, 2020 1,367,000 $ 0.71 3.14 $ 179 Exercisable - June 30, 2020 1,236,335 $ 0.72 3.09 $ 150 The following table summarizes unvested option activity: Weighted Weighted average average remaining grant-date amortization Number of fair value period options per option (years) Unvested - December 31, 2018 759,669 $ 0.45 1.14 Granted 350,000 0.30 Cancelled/Forfeited (35,000) 0.43 Vested (560,665) 0.41 Unvested - December 31, 2019 514,004 $ 0.40 0.61 Granted 50,000 0.20 Vested (433,339) 0.40 Unvested - June 30, 2020 130,665 $ 0.33 0.55 The fair value of stock options granted is estimated at the grant date using the Black-Scholes option pricing model. Option grants made during the six months ended June 30, 2020 and 2019 used the following weighted average assumptions: June 30, 2020 2019 Expected volatility 64.1 % 61.1 % Risk-free interest rate 0.3 % 2.0 % Expected life (years) 2.6 2.8 Dividend yield 0 % 0 % Forfeiture assumption 0 % 0 % Phantom Units A summary of unvested phantom units as of June 30, 2020 is set forth in the following table: Weighted average remaining Number of vesting term phantom units (years) Unvested - December 31, 2018 265,000 Cancelled/forfeited (32,667) Vested (88,333) Unvested - December 31, 2019 144,000 1.00 Unvested - June 30, 2020 144,000 0.50 Earnings Per Share The Company calculated quarter-to-date basic earnings per share for the three months ended June 30, 2020 as the difference between the loss per share of ($0.02) for the six months ended June 30, 2020 and the loss per share of ($0.03) for the three months ended March 31, 2020, resulting in $0.01 of basic net income per share for the three months ended June 30, 2020.

Provision for Environmental Lia

Provision for Environmental Liability	6 Months Ended
Provision for Environmental Liability	Jun. 30, 2020
Provision for Environmental Liability
Provision for Environmental Liability	7. Provision for Environmental Liability Vista maintains a $240 provision for reclamation costs attributable to certain mining claims previously held by the Company should no other potentially responsible parties be identified.

Commitments And Contingencies

Commitments And Contingencies	6 Months Ended
Commitments And Contingencies	Jun. 30, 2020
Commitments And Contingencies
Commitments And Contingencies	8. 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, future expenditures that may be required for compliance with these laws and regulations cannot be predicted. We conduct our operations in an effort to minimize effects on the environment and believe our operations are in compliance with applicable laws and regulations in all material respects. Under our agreement with the JAAC, 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 on other metals, subject to a minimum payment of A$50 per year. In addition, our agreement requires that we offer the JAAC the opportunity to establish a joint venture with Vista holding a 90% participating interest and the JAAC holding a 10% participating interest in Mt Todd.

Fair Value Accounting

Fair Value Accounting	6 Months Ended
Fair Value Accounting	Jun. 30, 2020
Fair Value Accounting
Fair Value Accounting	9. Fair Value Accounting The following table sets forth the Company’s assets measured at fair value by level within the fair value hierarchy. Fair value at June 30, 2020 Total Level 1 Level 3 Other investments $ 2,692 $ 2,692 $ — Fair value at December 31, 2019 Total Level 1 Level 3 Other investments $ 3,676 $ 3,676 $ — Our investment in Midas Gold Shares and Nusantara Shares are classified as Level 1 of the fair value hierarchy as they are valued at quoted market prices in an active market. There have been no transfers between levels in 2020, nor have there been any changes in valuation techniques.

Geographic and Segment informat

Geographic and Segment information	6 Months Ended
Geographic and Segment information	Jun. 30, 2020
Geographic and Segment information
Geographic And Segment Information	10. Geographic and Segment Information The Company has one reportable operating segment. 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 currently focused principally in Australia. We reported no revenues during the three and six months ended June 30, 2020 and 2019. Geographic location of mineral properties and plant and equipment is provided in Notes 4 and 5, respectively.

Mineral Properties (Tables)

Mineral Properties (Tables)	6 Months Ended
Mineral Properties (Tables)	Jun. 30, 2020
Mineral Properties
Schedule of Mineral Properties	At June 30, 2020 At December 31, 2019 Mt Todd, Australia $ 2,146 $ 2,146

Plant and Equipment (Tables)

Plant and Equipment (Tables)	6 Months Ended
Plant and Equipment (Tables)	Jun. 30, 2020
Plant and Equipment
Schedule Of Plant And Equipment	June 30, 2020 December 31, 2019 Accumulated Accumulated Cost depreciation Net Cost depreciation Net Mt Todd, Australia $ 5,237 $ 5,137 $ 100 $ 5,237 $ 5,114 $ 123 Corporate, United States 333 333 — 333 333 — Used mill equipment, Canada 5,500 — 5,500 5,500 — 5,500 $ 11,070 $ 5,470 $ 5,600 $ 11,070 $ 5,447 $ 5,623

Common Shares (Tables)

Common Shares (Tables)	6 Months Ended
Common Shares (Tables)	Jun. 30, 2020
Common Shares
Summary of stock-based compensation expense	Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Restricted share units $ 180 $ 126 $ 331 $ 127 Deferred share units — 209 209 209 Stock Options 22 81 52 131 $ 202 $ 416 $ 592 $ 467 Phantom units $ 35 $ 22 $ 34 $ 44
Summary of restricted stock unit activity	Weighted average Number grant-date fair of RSUs value per RSU Unvested - December 31, 2018 1,002,670 $ 0.78 Granted 1,412,500 0.49 Cancelled/forfeited (657,573) 0.76 Vested, net of shares withheld (266,296) 0.84 Unvested - December 31, 2019 1,491,301 $ 0.51 Granted 1,609,000 0.41 Cancelled/forfeited (211,019) 0.57 Vested, net of shares withheld (316,313) 0.57 Unvested - June 30, 2020 2,572,969 $ 0.43
Summary of deferred stock units	Weighted average Number of grant-date fair DSUs value per DSU Unvested - December 31, 2018 — — Granted 366,000 0.57 Outstanding - December 31, 2019 366,000 0.57 Granted 360,000 0.58 Outstanding - June 30, 2020 726,000 0.57
Summary of option activity	Weighted average Weighted average remaining Aggregate Number of exercise price contractual term intrinsic options per option (years) value Outstanding - December 31, 2018 1,319,149 0.71 3.84 $ 1 Granted 350,000 0.73 Exercised (163,667) 0.54 33 Cancelled/Forfeited (16,667) 0.75 — Expired (51,815) 0.70 2 Outstanding - December 31, 2019 1,437,000 $ 0.73 3.49 $ 35 Granted 50,000 0.51 Exercised (50,000) 0.75 9 Cancelled/Forfeited (70,000) 1.02 — Outstanding - June 30, 2020 1,367,000 $ 0.71 3.14 $ 179 Exercisable - June 30, 2020 1,236,335 $ 0.72 3.09 $ 150
Summary of the status of unvested stock options	Weighted Weighted average average remaining grant-date amortization Number of fair value period options per option (years) Unvested - December 31, 2018 759,669 $ 0.45 1.14 Granted 350,000 0.30 Cancelled/Forfeited (35,000) 0.43 Vested (560,665) 0.41 Unvested - December 31, 2019 514,004 $ 0.40 0.61 Granted 50,000 0.20 Vested (433,339) 0.40 Unvested - June 30, 2020 130,665 $ 0.33 0.55
Summary of stock option assumptions	June 30, 2020 2019 Expected volatility 64.1 % 61.1 % Risk-free interest rate 0.3 % 2.0 % Expected life (years) 2.6 2.8 Dividend yield 0 % 0 % Forfeiture assumption 0 % 0 %
Summary of phantom units	Weighted average remaining Number of vesting term phantom units (years) Unvested - December 31, 2018 265,000 Cancelled/forfeited (32,667) Vested (88,333) Unvested - December 31, 2019 144,000 1.00 Unvested - June 30, 2020 144,000 0.50

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	6 Months Ended
Fair Value Accounting (Tables)	Jun. 30, 2020
Fair Value Accounting
Schedule of assets measured at fair value	Fair value at June 30, 2020 Total Level 1 Level 3 Other investments $ 2,692 $ 2,692 $ — Fair value at December 31, 2019 Total Level 1 Level 3 Other investments $ 3,676 $ 3,676 $ —

Nature of Operations (Details)

Nature of Operations (Details) oz in Millions	6 Months Ended
Nature of Operations (Details) oz in Millions	Jun. 30, 2020ozshares	Dec. 31, 2019shares
Midas Gold Shares [Member]
Property, Plant and Equipment [Line Items]
Shares owned \| shares	4,667,615	6,882,115
Mt Todd, Australia
Property, Plant and Equipment [Line Items]
Percentage of ownership in project	100.00%
Proved Undeveloped Mine Reserve, Mass \| oz	5.3
Property, Plant and Equipment, Useful Life	13 years

Short-term and Other Investme_2

Short-term and Other Investments - Short-term (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Short-term investments
Available-for-sale Debt Securities, Amortized Cost Basis	$ 3,294	$ 3,260

Short-term and Other Investme_3

Short-term and Other Investments - Other Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Other Investments
Proceeds from Sale and Maturity of Marketable Securities			$ 954
Other investments, at fair value	$ 2,692		$ 2,692		$ 3,676
Midas Gold Shares [Member]
Other Investments
Shares owned	4,667,615		4,667,615		6,882,115
Marketable Securities Cumulative Gain (Loss)	$ (4,730)		$ (4,730)		$ (4,850)
Number Marketable Securities Sold	1,572,500	0	2,214,500	0
Proceeds from Sale and Maturity of Marketable Securities	$ 654		$ 954
Marketable Securities, Realized Gain (Loss)	$ 135		$ 120
Nusantara Resources
Other Investments
Shares owned	1,333,334		1,333,334		1,333,334

Mineral Properties - Properties

Mineral Properties - Properties (Details) - USD ($) $ in Thousands	1 Months Ended
	Mar. 31, 2006	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Mineral Properties, Net		$ 2,146	$ 2,146
Mt Todd, Australia
Property, Plant and Equipment [Line Items]
Mineral Properties, Net		$ 2,146	$ 2,146
Acquisition Costs, Period Cost	$ 2,146

Mineral Properties - Guadalupe

Mineral Properties - Guadalupe (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jun. 30, 2020	Sep. 30, 2020	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Mineral properties, Net		$ 2,146		$ 2,146	$ 2,146	$ 2,146
Deferred option gain		2,960		2,960	2,960
Gain (Loss) On Disposal Of Mineral Property Interests, Net				2,568	2,568
Guadalupe De Los Reyes, Mexico \| Option Agreement Two
Property, Plant and Equipment [Line Items]
Payments Received In Lieu Of Grant Of Royalty And Back-In Rights		2,100
Aggregate Payments Received To Date Of Sale Price Of Gold Project					4,500
Mineral properties, Net		0		0	0
Deferred option gain		2,892		$ 2,892	$ 2,892
Guadalupe De Los Reyes, Mexico \| Option Agreement Two \| Subsequent Event [Member]
Property, Plant and Equipment [Line Items]
Sale price of gold/silver project	$ 1,500
Guadalupe De Los Reyes, Mexico \| Option Agreement Two \| Scenario, Plan
Property, Plant and Equipment [Line Items]
Gain (Loss) On Disposal Of Mineral Property Interests, Net			$ 2,892,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-09-30 \| Guadalupe De Los Reyes, Mexico \| Option Agreement Two
Property, Plant and Equipment [Line Items]
Sale price of gold/silver project		1,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-31 \| Guadalupe De Los Reyes, Mexico \| Option Agreement Two
Property, Plant and Equipment [Line Items]
Payments Received In Lieu Of Grant Of Royalty And Back-In Rights		1,100,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-31 \| Guadalupe De Los Reyes, Mexico \| Option Agreement Two
Property, Plant and Equipment [Line Items]
Payments Received In Lieu Of Grant Of Royalty And Back-In Rights		$ 1

Mineral Properties - Awak Mas (

Mineral Properties - Awak Mas (Details) $ in Thousands	May 05, 2020USD ($)	Nov. 01, 2019USD ($)oz	Jun. 30, 2020USD ($)	Jun. 30, 2020USD ($)	May 04, 2020USD ($)	Dec. 31, 2019USD ($)
Property, Plant and Equipment [Line Items]
Gain (Loss) On Disposal Of Mineral Property Interests, Net			$ 2,568	$ 2,568
Disposal Group, Deferred Gain on Disposal						$ 2,960
PT Masmindo Dwi Area \| Awak Mas
Property, Plant and Equipment [Line Items]
NSR Cancellation Proceeds	$ 2,400
Gain (Loss) On Disposal Of Mineral Property Interests, Net	$ 2,568
Disposal Group, Deferred Gain on Disposal			$ 68	$ 68	$ 168
PT Masmindo Dwi Area \| Awak Mas \| First 1,250,000 Ounces Produced
Property, Plant and Equipment [Line Items]
NSR Royalty Cancellation, Percentage		1.00%
Remaining NSR Royalty Cancellation, Percentage		1.00%
Net Smelter Return Royalty Agreement Benchmark \| oz		1,250,000
NSR Royalty Cancelled Percentage	1.00%
PT Masmindo Dwi Area \| Awak Mas \| Next 1,250,000 Ounces Produced
Property, Plant and Equipment [Line Items]
NSR Royalty Cancellation, Percentage		1.25%
Remaining NSR Royalty Cancellation, Percentage		1.25%
Net Smelter Return Royalty Agreement Benchmark \| oz		1,250,000
NSR Royalty Cancelled Percentage	1.25%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-20 \| PT Masmindo Dwi Area \| Awak Mas \| First 1,250,000 Ounces Produced
Property, Plant and Equipment [Line Items]
NSR Cancellation Receivable		$ 2,400
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-30 \| PT Masmindo Dwi Area \| Awak Mas
Property, Plant and Equipment [Line Items]
NSR Cancellation Proceeds		$ 2,500

Plant and Equipment (Details)

Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Cost	$ 11,070	$ 11,070
Accumulated depreciation	5,470	5,447
Net	5,600	5,623
Mt Todd, Australia
Property, Plant and Equipment [Line Items]
Cost	5,237	5,237
Accumulated depreciation	5,137	5,114
Net	100	123
Corporate, United States
Property, Plant and Equipment [Line Items]
Cost	333	333
Accumulated depreciation	333	333
Net	0	0
Used mill equipment, Canada
Property, Plant and Equipment [Line Items]
Cost	5,500	5,500
Accumulated depreciation	0	0
Net	$ 5,500	$ 5,500

Common Shares - ATM Agreement (

Common Shares - ATM Agreement (Details)	1 Months Ended	3 Months Ended	6 Months Ended
Common Shares - ATM Agreement (Details)	Jun. 30, 2020USD ($)security	Jun. 30, 2020USD ($)shares	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)
Subsidiary, Sale of Stock [Line Items]
Proceeds from Issuance of Common Stock			$ 807,000
At-The-Market Offering Agreement [Member] \| H. C. Wainwright And Co., LLC [Member]
Subsidiary, Sale of Stock [Line Items]
Threshold of aggregate sales proceeds	$ 10,000,000
Stock Issued During Period, Shares, New Issues \| shares		1,031,819
Proceeds from Issuance of Common Stock		$ 807,000
Offers or sales of common shares under Agreement to be made in Canada \| security	0
Offers or sales of common shares				$ 0

Common Shares - Warrants (Detai

Common Shares - Warrants (Details)	1 Months Ended
Common Shares - Warrants (Details)	Aug. 31, 2019shares
Common Shares
Class Of Warrant Or Right, Remaining, Expired	6,514,625

Common Shares - Stock-Based Com

Common Shares - Stock-Based Compensation (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2020	May 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of issued and outstanding Common Shares					10.00%
Stock-based compensation expense			$ 202	$ 416	$ 592	$ 467
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			22	81	52	131
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			180	126	331	127
Deferred Stock Units (DSU) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 209	$ 209	0	209	209	209
Phantom Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period							3 years
Stock-based compensation expense			$ 35	$ 22	$ 34	$ 44

Common Shares - Unrecognized Co

Common Shares - Unrecognized Compensation (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock options	$ 12
Weighted average unrecognized compensation recognition period	7 months 6 days
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to unvested awards	$ 622
Weighted average unrecognized compensation recognition period	1 year 3 months 18 days
Phantom Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to unvested awards	$ 60
Weighted average unrecognized compensation recognition period	6 months

Common Shares - Summary Of Rest

Common Shares - Summary Of Restricted Stock Units Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments Related to Tax Withholding for Share-based Compensation	$ 97	$ 46
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Number of units, beginning of period (in shares)	1,491,301	1,002,670	1,002,670
Granted, Number of units (in shares)	1,609,000		1,412,500
Cancelled/forfeited, Number of units (in shares)	(211,019)		(657,573)
Vested, net of shares withheld, Number of units (in shares)	(316,313)		(266,296)
Unvested, Number of units, end of period (in shares)	2,572,969		1,491,301
Unvested, weighted average fair value, beginning of year (in dollars per share)	$ 0.51	$ 0.78	$ 0.78
Granted, Weighted average fair value (in dollars per share)	0.41		0.49
Cancelled/forfeited, Weighted average fair value (in dollars per share)	0.57		0.76
Vested, Weighted average fair value (in dollars per share)	0.57		0.84
Unvested, weighted average fair value, end of year (in dollars per share)	$ 0.43		$ 0.51
Payments Related to Tax Withholding for Share-based Compensation	$ 97,000	$ 46,000

Common Shares - Summary Of Defe

Common Shares - Summary Of Deferred Share Units Activity (Details) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2020USD ($)shares	May 31, 2019USD ($)shares	Jun. 30, 2020USD ($)$ / sharesshares	Jun. 30, 2019USD ($)	Jun. 30, 2020USD ($)$ / sharesshares	Jun. 30, 2019USD ($)$ / sharesshares	Dec. 31, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense \| $			$ 202	$ 416	$ 592	$ 467
Deferred Stock Units (DSU) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares issues for each DSU (at end of board members' team).					1
Unvested, Number of units, beginning of period (in shares) \| shares					366,000	0	0
Granted, Number of units (in shares) \| shares	360,000	366,000			360,000		366,000
Unvested, Number of units, end of period (in shares) \| shares			726,000		726,000		366,000
Unvested, weighted average fair value, beginning of year (in dollars per share) \| $ / shares					$ 0.57	$ 0	$ 0
Granted, Weighted average fair value (in dollars per share) \| $ / shares					0.58		0.57
Unvested, weighted average fair value, end of year (in dollars per share) \| $ / shares			$ 0.57		$ 0.57		$ 0.57
Allocated Share-based Compensation Expense \| $	$ 209	$ 209	$ 0	$ 209	$ 209	$ 209

Common Shares - Summary Of Opti

Common Shares - Summary Of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Common Shares
Number of options, beginning of period (in shares)	1,437,000	1,319,149
Granted, Number of options (in shares)	50,000	350,000
Number of options, Exercised (in shares)	(50,000)	(163,667)
Number of options, Cancelled/Forfeited (in shares)	(70,000)	(16,667)
Number of options, Expired (in shares)		(51,815)
Number of options, end of period (in shares)	1,367,000	1,437,000	1,319,149
Number of options, Exercisable (in shares)	1,236,335
Weighted average exercise price per option, beginning of period (in dollars per share)	$ 0.73	$ 0.71
Weighted average exercise price per option, Granted (in dollars per share)	0.51	0.73
Weighted average exercise price per option, Exercised (in dollars per share)	0.75	0.54
Weighted average exercise price per option, Cancelled/Forfeited (in dollars per share)	1.02	0.75
Weighted average exercise price per option, Expired (in dollars per share)		0.70
Weighted average exercise price per option, end of period (in dollars per share)	0.71	$ 0.73	$ 0.71
Weighted average exercise price, Exercisable (in dollars per share)	$ 0.72
Weighted average remaining contractual term, Outstanding	3 years 1 month 20 days	3 years 5 months 26 days	3 years 10 months 2 days
Weighted average remaining contractual term, Exercisable	3 years 1 month 2 days
Aggregate intrinsic value, Outstanding, beginning of period (in dollars)	$ 35	$ 1
Aggregate intrinsic value, Exercised (in dollars)	$ 9	$ 33
Aggregate intrinsic value, Cancelled/Forfeited (in dollars)	$ 0	$ 0
Aggregate intrinsic value, Expired (in dollars)		$ 2
Aggregate intrinsic value, Outstanding, end of period (in dollars)	$ 179	$ 35	$ 1
Aggregate intrinsic value, Options, Exercisable	$ 150

Common Shares - Summary Of The

Common Shares - Summary Of The Status Of Unvested Stock Options (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of options (in shares)	50,000	350,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Number of options, beginning of period (in shares)	514,004	759,669
Granted, Number of options (in shares)	50,000	350,000
Cancelled/Forfeited, Number of options (in shares)		(35,000)
Vested, Number of options (in shares)	(433,339)	(560,665)
Unvested, Number of options, end of period (in shares)	130,665	514,004	759,669
Unvested, Weighted average grant date fair value, beginning of period (in dollars per share)	$ 0.40	$ 0.45
Granted, Weighted average grant-date fair value per option (in dollars per share)	0.20	0.30
Cancelled/Forfeited, Weighted average grant-date fair value per option (in dollars per share)		0.43
Vested, Weighted average grant-date fair value per option (in dollars per share)	0.40	0.41
Unvested, Weighted average grant date fair value per option, end of period (in dollars per share)	$ 0.33	$ 0.40	$ 0.45
Weighted average remaining amortization period	6 months 18 days	7 months 9 days	1 year 1 month 20 days

Common Shares - Assumptions (De

Common Shares - Assumptions (Details)	6 Months Ended
Common Shares - Assumptions (Details)	Jun. 30, 2020	Jun. 30, 2019
Common Shares
Expected volatility (as a percent)	64.10%	61.10%
Risk-free interest rate (as a percent)	0.30%	2.00%
Expected life (years)	2 years 7 months 6 days	2 years 9 months 18 days
Dividend yield	0.00%	0.00%
Forfeiture assumption (as a percent)	0.00%	0.00%

Common Shares - Summary Of Phan

Common Shares - Summary Of Phantom Units Activity (Details) - $ / shares	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnings Per Share, Basic	$ 0.01	$ (0.03)	$ (0.03)	$ (0.02)	$ (0.06)
Phantom Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Number of units, beginning of period (in shares)		144,000		144,000	265,000	265,000
Cancelled/forfeited, Number of units (in shares)						(32,667)
Vested, net of shares withheld, Number of units (in shares)						(88,333)
Unvested, Number of units, end of period (in shares)	144,000			144,000		144,000
Weighted average remaining contractual term				6 months		1 year

Provision for Environmental L_2

Provision for Environmental Liability (Details) $ in Thousands	Jun. 30, 2020USD ($)
Provision for Environmental Liability
Mine Reclamation and Closing Liability, Noncurrent	$ 240

Commitments And Contingencies (

Commitments And Contingencies (Details) - Mt Todd, Australia $ in Thousands	6 Months Ended
	Jun. 30, 2020AUD ($)
Loss Contingencies [Line Items]
Percentage of ownership in project	100.00%
Scenario, Plan
Loss Contingencies [Line Items]
Percentage of ownership in project	90.00%
Scenario, Plan \| Jawoyn Association Aboriginal Corporation
Loss Contingencies [Line Items]
Percentage of ownership in project	10.00%
Percentage of royalty on gold	1.00%
Percentage of royalty on other metals	1.00%
Minimum payment per year	$ 50

Fair Value Accounting (Details)

Fair Value Accounting (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Fair Value Accounting
Other investments, at fair value	$ 2,692	$ 3,676
Fair Value Transfers Between Levels	0
Recurring \| Midas Gold Shares [Member]
Fair Value Accounting
Other investments, at fair value	2,692	3,676
Recurring \| Fair Value, Inputs, Level 1 [Member] \| Midas Gold Shares [Member]
Fair Value Accounting
Other investments, at fair value	2,692	3,676
Recurring \| Fair Value, Inputs, Level 3 [Member] \| Midas Gold Shares [Member]
Fair Value Accounting
Other investments, at fair value	$ 0	$ 0

Geographic And Segment Inform_2

Geographic And Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
Geographic And Segment Information (Details) $ in Thousands	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2020USD ($)segment	Jun. 30, 2019USD ($)
Geographic and Segment information
Number of reportable segments \| segment			1
Revenues \| $	$ 0	$ 0	$ 0	$ 0