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Significant Accounting Policies and US GAAP (Tables) | 6 Months Ended
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Jun. 30, 2012
Significant Accounting Policies and U.S. GAAP [Abstract] |
Subsidiaries and percentage ownership in subsidiaries | The consolidated interim financial statements of Vista consolidate the accounts of entities in which we have a controlling financial interest. All intercompany balances and transactions have been eliminated in the consolidated financial statements. Our subsidiaries and percentage ownership in these entities are:
|  | Ownership |
Vista Gold U.S., Inc. and its subsidiary |  |  | 100 | %
Vista California, LLC |  |  | 100 | %
Granges Inc. |  |  | 100 | %
Desarrollos Zapal Holding Corp. and its subsidiaries |  |  | 100 | %
Desarrollos Zapal S.A. de C.V. (1% owned by Granges Inc.) and its subsidiaries (a) |  |  | 99 | %
Servicios Administrativos MPA S.A. de C.V. (1% owned by Granges Inc.) |  |  | 99 | %
Servicios Industriales MPA S.A. de C.V. (1% owned by Granges Inc.) |  |  | 99 | %
Vista Gold (Barbados) Corp. and its wholly-owned subsidiary |  |  | 100 | %
Salu Siwa Pty. Ltd and its subsidiary |  |  | 100 | %
PT Masmindo Dwi Area (1% owned by Vista Gold (Barbados) Corp.) |  |  | 99 | %
Vista Minerals (Barbados) Corp. and its wholly-owned subsidiary |  |  | 100 | %
Vista Gold Australia Pty Ltd. |  |  | 100 | %
Minera Gold Stake Holdings Corp. (name changed from Vitliq Holdings Corp. effective January 23, 2012) |  |  | 100 | %
Minera Gold Stake S.A. de C.V. (name changed from Vitliq S.A. de C.V. effective January 23, 2012) (1% owned by Granges Inc.) |  |  | 99 | %
| (a) | On February 7, 2012, we entered into an earn-in right agreement (the "Earn-in Right Agreement") with Invecture Group, S.A de C.V. ("Invecture") whereby Invecture has the right, exercisable by February 7, 2014 (subject to extension) (the "Earn-in Right Period"), to earn a 62.5% interest in the Concordia gold project, which is owned through our wholly-owned, Mexican subsidiary, Desasarrollos Zapal, S.A. de C.V. ("DZ Mexico"). During the Earn-in Right Period and subject to the terms of the Earn-in Right Agreement, Vista holds 37.5% of the DZ Mexico shareholder voting rights. The remaining 62.5% of the DZ Mexico shareholder voting rights are held in a trust that is instructed by representatives of Vista and Invecture. Upon Invecture's exercise of the earn-in right, Vista will continue to hold a 37.5% interest in DZ Mexico and the Concordia gold project. See Note 5 for further discussion.

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- Definition The tabular disclosure of the parent's ownership interest in its subsidiaries. + References No definition available. + Details
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