PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)
 3 Months Ended
Mar. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Prepaid and Other Current Assets
Prepaid expenses and other current assets at December 31, 2021 and 2020 consisted of the following:
 December 31, 2021December 31, 2020
Accounts receivable - service income$25,944 $— 
Accounts receivable - Tonogold reimbursements407,127 — 
Accrued interest receivable487,651 
Surety bond and insurance229,124 139,527 
Receivable on sale of equity securities— 200,000 
Other187,137 195,951 
Total prepaid expenses and other current assets$1,336,983 $535,478 
Schedule of Deposit Assets Type
Deposits at December 31, 2021 and 2020 consisted of the following:
December 31, 2021December 31, 2020
Security deposits$5,399 $— 
Land and property deposits40,100 42,600 
Pelen option200,000 100,000 
Vendor deposits101,955 3,000 
Total deposits, current347,454 145,600 
Vendor deposits, non-current3,219,607 — 
Total$3,567,061 $145,600