Short-term and Other Investments	3 Months Ended
Mar. 31, 2021
Short-term and Other Investments
Short-term and Other Investments	3. Short-term and Other Investments Short-term investments As of March 31, 2021, and December 31, 2020, the amortized cost basis of our short-term investments was $nil and $400, respectively, which approximated fair value. Short-term investments at December 31, 2020 were comprised of U.S. 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 were included in cash and cash equivalents. Other investments The Company’s investments in common shares of Nusantara Resources Limited shares (“Nusantara Shares”) were recorded at fair value in the Unaudited Condensed Consolidated Balance Sheet at March 31, 2021. In addition to the Nusantara Shares, Vista also held common shares of Midas Gold Corp. (“Midas Gold Shares”) during the three months ended March 31, 2020. Changes in fair value of the Nusantara Shares and Midas Gold Shares were recorded in the Unaudited Condensed Consolidated Statements of Income/(Loss) in the period in which the changes occurred. The Company held 1,333,334 Nusantara Shares at March 31, 2021 and December 31, 2020. All Midas Gold Shares were sold prior to 2021. The fair value of other investments was $263 and $293 at March 31, 2021 and December 31, 2020, respectively. During the three months ended March 31, 2020, the Company sold 642,000 Midas Gold Shares for net proceeds of $300 and a loss of $15 compared to the most recent measurement period. No Midas Gold Shares were sold during the three months ended March 31, 2021.

Short-term and Other Investments

3 Months Ended

Mar. 31, 2021

3. Short-term and Other Investments

Short-term investments

As of March 31, 2021, and December 31, 2020, the amortized cost basis of our short-term investments was $nil and $400, respectively, which approximated fair value. Short-term investments at December 31, 2020 were comprised of U.S. 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 were included in cash and cash equivalents.

Other investments

The Company’s investments in common shares of Nusantara Resources Limited shares (“Nusantara Shares”) were recorded at fair value in the Unaudited Condensed Consolidated Balance Sheet at March 31, 2021. In addition to the Nusantara Shares, Vista also held common shares of Midas Gold Corp. (“Midas Gold Shares”) during the three months ended March 31, 2020. Changes in fair value of the Nusantara Shares and Midas Gold Shares were recorded in the Unaudited Condensed Consolidated Statements of Income/(Loss) in the period in which the changes occurred.

The Company held 1,333,334 Nusantara Shares at March 31, 2021 and December 31, 2020. All Midas Gold Shares were sold prior to 2021. The fair value of other investments was $263 and $293 at March 31, 2021 and December 31, 2020, respectively. During the three months ended March 31, 2020, the Company sold 642,000 Midas Gold Shares for net proceeds of $300 and a loss of $15 compared to the most recent measurement period. No Midas Gold Shares were sold during the three months ended March 31, 2021.