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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Cash flows from operating activities: |  |  |
Net income/(loss) |  | $ (6,921) | $ 2,622
Adjustments to reconcile net income/(loss) to net cash used in operations: |  |  |
Depreciation and amortization | $ 11 | 36 | 34
Stock-based compensation |  | 727 | 757
Gain on disposal of mineral property | (3,540) | (2,100) | (6,108)
Gain on other investments | (2,437) | (41) | (2,407)
Change in working capital account items: |  |  |
Other current assets |  | 300 | 292
Accounts payable, accrued liabilities and other |  | 561 | 112
Net cash used in operating activities |  | (7,438) | (4,698)
Cash flows from investing activities: |  |  |
Proceeds from sales of marketable securities |  |  | 5,788
Disposition/(acquisitions) of short-term investments, net |  | 400 | (789)
Additions to plant and equipment |  | (105) |
Proceeds from option/sale agreements, net |  | 2,415 | 3,048
Net cash provided by investing activities |  | 2,710 | 8,047
Cash flows from financing activities: |  |  |
Proceeds from equity financing, net |  | 13,385 | 1,436
Payment of taxes from withheld shares |  | (401) | (124)
Proceeds from exercise of stock options |  |  | 37
Net cash provided by financing activities |  | 12,984 | 1,349
Net increase in cash and cash equivalents |  | 8,256 | 4,698
Cash and cash equivalents, beginning of period |  | 7,762 | 1,408
Cash and cash equivalents, end of period | $ 6,106 | $ 16,018 | $ 6,106

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- Definition Gain (Loss) On Disposal Of Mineral Property Interests, Net + References No definition available. + Details
Name: | vgz_GainLossOnDisposalOfMineralPropertyInterestsNet
Namespace Prefix: | vgz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration