| Schedule of Notes Receivable and Advances, Net |
Notes receivable and advances, net at December 31, 2021 and 2020 include: | | | | | | | | | | | | | December 31, 2021 | | December 31, 2020 | | Current portion | | | | | Tonogold note receivable, face value | $ | — | | | $ | 4,475,000 | | | Unrealized gain | — | | | 1,023,500 | | | Tonogold note receivable, fair value | — | | | 5,498,500 | | | Sierra Springs advances receivable | 4,935,000 | | | 1,650,000 | | | Other notes receivable | 29,545 | | | — | | | Total notes receivable and advances, current portion | $ | 4,964,545 | | | $ | 7,148,500 | | | | | | | Non-current portion | | | | | Tonogold note receivable, face value | 6,650,000 | | | — | | | Unrealized gain | 605,000 | | | — | | | Tonogold note receivable, fair value | 7,255,000 | | | — | | | MCU-P note receivable, face value | 2,000,000 | | | 1,180,000 | | Unamortized discount for implied interest | (401,159) | | | (319,060) | | | MCU-Philippines note receivable, non-current portion, net | 8,853,841 | | | 860,940 | | | Total notes receivable and advances, net | $ | 13,818,386 | | | $ | 8,009,440 | |
Notes receivable and advances, net at March 31, 2022 and December 31, 2021 include: | | | | | | | | | | | | | March 31, 2022 | | December 31, 2021 | | Current portion | | | | | Sierra Springs advances receivable | $ | 4,935,000 | | | $ | 4,935,000 | | | Other notes receivable | 27,043 | | | 29,545 | | | Total notes receivable and advances, current portion | $ | 4,962,043 | | | $ | 4,964,545 | | | | | | | Non-current portion | | | | | Tonogold note receivable, face value | — | | | 6,650,000 | | | Unrealized gain | — | | | 605,000 | | | Tonogold note receivable, fair value | — | | | 7,255,000 | | | MCU-P note receivable, face value | — | | | 2,000,000 | | Unamortized discount for implied interest | — | | | (401,159) | | | MCU-Philippines note receivable, non-current portion, net | — | | | 1,598,841 | | | Total notes receivable and advances, net | $ | 4,962,043 | | | $ | 13,818,386 | |
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