PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) |
Mar. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|---|
| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | |||
| Accounts receivable - service income | $ 25,944 | $ 0 | |
| Accounts receivable - Tonogold reimbursements | 407,127 | 0 | |
| Accrued interest receivable | 487,651 | ||
| Surety bond and insurance | 229,124 | 139,527 | |
| Receivable on sale of equity securities | 0 | 200,000 | |
| Other | 187,137 | 195,951 | |
| Total prepaid expenses and other current assets | $ 1,576,962 | $ 1,336,983 | $ 535,478 |